File replacement not working in angular 18

I am having env.js and env.prod.js
I try switching between the env to env.prod using the given angular.json file

but the content of env.js didn’t change at all… although environment file changed successfully.
I have similar implementation in older versions and it is working.

{
  "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
  "version": 1,
  "newProjectRoot": "projects",
  "projects": {
    "my-project": {
      "root": "",
      "sourceRoot": "src",
      "projectType": "application",
      "prefix": "app",
      "schematics": {
        "@schematics/angular:component": {
          "style": "sass"
        }
      },
      "architect": {
        "build": {
          "builder": "@angular-devkit/build-angular:browser",
          "options": {
            "outputPath": "dist",
            "index": "src/index.html",
            "main": "src/main.ts",
            "polyfills": ["zone.js"],
            "tsConfig": "src/tsconfig.app.json",
            "assets": [
              "src/favicon.ico",
              "src/assets",
              "src/env.js",
              "src/env.prod.js"
            ],
            "styles": [
              "src/styles.css",
              "node_modules/bootstrap/dist/css/bootstrap.min.css",
  "node_modules/bootstrap-icons/font/bootstrap-icons.css"
            ],
            "scripts": [
              "./node_modules/bootstrap/dist/js/bootstrap.min.js",
              "./node_modules/jquery/dist/jquery.min.js",
              "./node_modules/popper.js/dist/umd/popper.min.js",
              "node_modules/@fortawesome/fontawesome-free/js/all.js"        ]
          },
          "configurations": {
            "production": {

              "fileReplacements": [
          {
            "replace": "src/environments/environment.ts",
            "with": "src/environments/environment.prod.ts"
          },
          {
            "replace": "src/env.js",
            "with": "src/env-prod.js"
          }
        ],
              "optimization": false,
              "outputHashing": "all",
              "sourceMap": false,
              "namedChunks": false,
              "aot": true,
              "extractLicenses": true,
              "vendorChunk": false,
              "buildOptimizer": true,
              "budgets": [
                {
                  "type": "initial",
                  "maximumWarning": "10mb",
                  "maximumError": "15mb"
                }
              ]
            },
            "development": {
              "fileReplacements": [
                {
                  "replace": "src/environments/environment.prod.ts",
                  "with": "src/environments/environment.ts"
                },
                {
                  "replace": "src/env.prod.js",
                  "with": "src/env.js"
                }
              ]
            }
          },
            "defaultConfiguration": "production"
        },
        "serve": {
          "builder": "@angular-devkit/build-angular:dev-server",
          "options": {
            "buildTarget": "my-project:build:development"
          },
          "configurations": {
            "production": {
              "buildTarget": "my-project:build:production"
            },
            "development": {
              "buildTarget": "my-project:build:development"
            }
          }
        },
        "extract-i18n": {
          "builder": "@angular-devkit/build-angular:extract-i18n",
          "options": {
          }
        },
        "test": {
          "builder": "@angular-devkit/build-angular:karma",
          "options": {
            "main": "src/test.ts",
            "polyfills": ["zone.js"],
            "tsConfig": "src/tsconfig.spec.json",
            "karmaConfig": "src/karma.conf.js",
            "styles": [
              "src/styles.scss"
            ],
            "scripts": [],
            "assets": [
              "src/favicon.ico",
              "src/assets"
            ]
          }
        },
        "lint": {
          "builder": "@angular-devkit/build-angular:tslint",
          "options": {
            "tsConfig": [
              "src/tsconfig.app.json",
              "src/tsconfig.spec.json"
            ],
            "exclude": [
              "**/node_modules/**"
            ]
          }
        }
      }
    },
    "my-project-e2e": {
      "root": "e2e/",
      "projectType": "application",
      "prefix": "",
      "architect": {
        "e2e": {
          "builder": "@angular-devkit/build-angular:protractor",
          "options": {
            "protractorConfig": "e2e/protractor.conf.js",
            "devServerTarget": "my-project:serve"
          },
          "configurations": {
            "production": {
              "devServerTarget": "my-project:serve:production"
            }
          }
        },
        "lint": {
          "builder": "@angular-devkit/build-angular:tslint",
          "options": {
            "tsConfig": "e2e/tsconfig.e2e.json",
            "exclude": [
              "**/node_modules/**"
            ]
          }
        }
      }
    }
  },
  "cli": {
    "analytics": false
  }
}

I tried above with no hope.