Updated the files.

my-app/node_modules/@schematics/angular/pipe/files/__name@dasherize@if-flat__/__name@dasherize__.pipe.spec.ts.template

@@ -0,0 +1,8 @@
+import { <%= classify(name) %>Pipe } from './<%= dasherize(name) %>.pipe';
+
+describe('<%= classify(name) %>Pipe', () => {
+  it('create an instance', () => {
+    const pipe = new <%= classify(name) %>Pipe();
+    expect(pipe).toBeTruthy();
+  });
+});

my-app/node_modules/@schematics/angular/pipe/files/__name@dasherize@if-flat__/__name@dasherize__.pipe.ts.template

@@ -0,0 +1,13 @@
+import { Pipe, PipeTransform } from '@angular/core';
+
+@Pipe({
+  name: '<%= camelize(name) %>'<% if(standalone) {%>,
+  standalone: true<%}%>
+})
+export class <%= classify(name) %>Pipe implements PipeTransform {
+
+  transform(value: unknown, ...args: unknown[]): unknown {
+    return null;
+  }
+
+}

my-app/node_modules/@schematics/angular/pipe/index.d.ts

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+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+import { Rule } from '@angular-devkit/schematics';
+import { Schema as PipeOptions } from './schema';
+export default function (options: PipeOptions): Rule;

my-app/node_modules/@schematics/angular/pipe/index.js

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+"use strict";
+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+const schematics_1 = require("@angular-devkit/schematics");
+const add_declaration_to_ng_module_1 = require("../utility/add-declaration-to-ng-module");
+const find_module_1 = require("../utility/find-module");
+const parse_name_1 = require("../utility/parse-name");
+const validation_1 = require("../utility/validation");
+const workspace_1 = require("../utility/workspace");
+function default_1(options) {
+    return async (host) => {
+        options.path ??= await (0, workspace_1.createDefaultPath)(host, options.project);
+        options.module = (0, find_module_1.findModuleFromOptions)(host, options);
+        const parsedPath = (0, parse_name_1.parseName)(options.path, options.name);
+        options.name = parsedPath.name;
+        options.path = parsedPath.path;
+        (0, validation_1.validateClassName)(schematics_1.strings.classify(options.name));
+        const templateSource = (0, schematics_1.apply)((0, schematics_1.url)('./files'), [
+            options.skipTests ? (0, schematics_1.filter)((path) => !path.endsWith('.spec.ts.template')) : (0, schematics_1.noop)(),
+            (0, schematics_1.applyTemplates)({
+                ...schematics_1.strings,
+                'if-flat': (s) => (options.flat ? '' : s),
+                ...options,
+            }),
+            (0, schematics_1.move)(parsedPath.path),
+        ]);
+        return (0, schematics_1.chain)([
+            (0, add_declaration_to_ng_module_1.addDeclarationToNgModule)({
+                type: 'pipe',
+                ...options,
+            }),
+            (0, schematics_1.mergeWith)(templateSource),
+        ]);
+    };
+}
+exports.default = default_1;

my-app/node_modules/@schematics/angular/pipe/schema.d.ts

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+/**
+ * Creates a new, generic pipe definition in the given project.
+ */
+export interface Schema {
+    /**
+     * The declaring NgModule exports this pipe.
+     */
+    export?: boolean;
+    /**
+     * When true (the default) creates files at the top level of the project.
+     */
+    flat?: boolean;
+    /**
+     * The declaring NgModule.
+     */
+    module?: string;
+    /**
+     * The name of the pipe.
+     */
+    name: string;
+    /**
+     * The path at which to create the pipe, relative to the workspace root.
+     */
+    path?: string;
+    /**
+     * The name of the project.
+     */
+    project: string;
+    /**
+     * Do not import this pipe into the owning NgModule.
+     */
+    skipImport?: boolean;
+    /**
+     * Do not create "spec.ts" test files for the new pipe.
+     */
+    skipTests?: boolean;
+    /**
+     * Whether the generated pipe is standalone.
+     */
+    standalone?: boolean;
+}

my-app/node_modules/@schematics/angular/pipe/schema.js

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+"use strict";
+// THIS FILE IS AUTOMATICALLY GENERATED. TO UPDATE THIS FILE YOU NEED TO CHANGE THE
+// CORRESPONDING JSON SCHEMA FILE, THEN RUN devkit-admin build (or bazel build ...).
+Object.defineProperty(exports, "__esModule", { value: true });

my-app/node_modules/@schematics/angular/pipe/schema.json

@@ -0,0 +1,67 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema",
+  "$id": "SchematicsAngularPipe",
+  "title": "Angular Pipe Options Schema",
+  "type": "object",
+  "additionalProperties": false,
+  "description": "Creates a new, generic pipe definition in the given project.",
+  "properties": {
+    "name": {
+      "type": "string",
+      "description": "The name of the pipe.",
+      "$default": {
+        "$source": "argv",
+        "index": 0
+      },
+      "x-prompt": "What name would you like to use for the pipe?"
+    },
+    "path": {
+      "type": "string",
+      "format": "path",
+      "$default": {
+        "$source": "workingDirectory"
+      },
+      "description": "The path at which to create the pipe, relative to the workspace root.",
+      "visible": false
+    },
+    "project": {
+      "type": "string",
+      "description": "The name of the project.",
+      "$default": {
+        "$source": "projectName"
+      }
+    },
+    "flat": {
+      "type": "boolean",
+      "default": true,
+      "description": "When true (the default) creates files at the top level of the project."
+    },
+    "skipTests": {
+      "type": "boolean",
+      "description": "Do not create \"spec.ts\" test files for the new pipe.",
+      "default": false
+    },
+    "skipImport": {
+      "type": "boolean",
+      "default": false,
+      "description": "Do not import this pipe into the owning NgModule."
+    },
+    "standalone": {
+      "description": "Whether the generated pipe is standalone.",
+      "type": "boolean",
+      "default": true,
+      "x-user-analytics": "ep.ng_standalone"
+    },
+    "module": {
+      "type": "string",
+      "description": "The declaring NgModule.",
+      "alias": "m"
+    },
+    "export": {
+      "type": "boolean",
+      "default": false,
+      "description": "The declaring NgModule exports this pipe."
+    }
+  },
+  "required": ["name", "project"]
+}