Repository: angular
Issue: control flow schematics:  projected content '<ng-content>' is not working post migration
Labels: area: migrations,core: control flow

### Which @angular/* package(s) are the source of the bug?

core

### Is this a regression?

Yes

### Description

origin Working code -
```
<!-- Loading icon button -->
<ng-container *ngIf="trqLoading !== undefined; else deafultTemplate">
  <trq-loading-icon *ngIf="isLoading" class="trq-position-absolute"></trq-loading-icon>
  <span [ngClass]="{'trq-invisible': isLoading }">
    <ng-container *ngTemplateOutlet="deafultTemplate"></ng-container>
  </span>
</ng-container>

<!-- Default -->
<ng-template #deafultTemplate>
  <ng-content></ng-content>
</ng-template>
```

output post running `yarn ng generate @angular/core:control-flow`

```
<!-- Loading icon button -->
@if (trqLoading !== undefined) { @if (isLoading) {
<trq-loading-icon class="trq-position-absolute"></trq-loading-icon>
}
<span [ngClass]="{'trq-invisible': isLoading }">
  <ng-container *ngTemplateOutlet="deafultTemplate"></ng-container>
</span>
} @else {
  <ng-content></ng-content>
}

<!-- Default -->
<ng-template #deafultTemplate>
    <ng-content></ng-content>
</ng-template>
```

how the above selector is called in other components -
```
<div class="button-example">
  <div class="trq-headline">Small Buttons</div>
  <hr />
  <button [trqButton]="buttonType.PRIMARY">Primary Action</button>
  <button class="trq-ml-3" trqButton>Secondary Action</button>
  <button class="trq-ml-3" [trqButton]="buttonType.OUTLINE">Outline Button</button>
  <button class="trq-ml-3" [trqButton]="buttonType.WARNING">Warning Button</button>
</div>
```


![image](https://github.com/angular/angular/assets/19345828/19090b8e-a44b-4309-8265-15f4db29ac94)

![image](https://github.com/angular/angular/assets/19345828/9d3a3e7c-6a0c-4fa4-b43b-e6348df831ee)


as shown in the image, <ng-content> data is not coming post migration.


### Please provide a link to a minimal reproduction of the bug

_No response_

### Please provide the exception or error you saw

```true
No Error
```


### Please provide the environment you discovered this bug in (run `ng version`)

```true
"dependencies": {
    "@angular/animations": "18.0.0",
    "@angular/cdk": "18.0.0",
    "@angular/common": "18.0.0",
    "@angular/compiler": "18.0.0",
    "@angular/core": "18.0.0",
    "@angular/forms": "18.0.0",
    "@angular/platform-browser": "18.0.0",
    "@angular/platform-browser-dynamic": "18.0.0",
    "@angular/router": "18.0.0",
    "@hyperviewhq/angular2gridster": "16.0.0",
    "@ngneat/content-loader": "^7.0.0",
    "@ngrx/store": "16.3.0",
    "@ngx-formly/core": "6.1.1",
    "@ngx-translate/core": "~14.0.0",
    "@nx/angular": "17.0.3",
    "@nx/plugin": "17.0.3",
    "@swimlane/ngx-charts": "^20.4.1",
    "@torque/clampjs": "1.0.6",
    "@torque/clr-angular": "5.0.0-trq.105",
    "@torque/clr-core": "5.0.0-trq.105",
    "@torque/clr-ui": "5.0.0-trq.105",
    "@torque/ng2-date-picker": "13.0.61",
    "@torque/tinymce": "6.4.0-trq.21",
    "@types/d3-array": "^3.0.8",
    "@types/d3-axis": "^3.0.4",
    "@types/d3-format": "^3.0.2",
    "@types/d3-geo": "^3.0.5",
    "@types/d3-scale": "^4.0.5",
    "@types/d3-selection": "^3.0.7",
    "@types/d3-transition": "^3.0.5",
    "@types/d3-zoom": "^3.0.5",
    "@types/element-resize-detector": "^1.1.4",
    "@types/lodash": "4.14.182",
    "@types/lodash-es": "^4.17.9",
    "@types/masonry-layout": "^4.2.5",
    "@types/mousetrap": "^1.6.12",
    "@types/topojson-client": "^3.1.2",
    "@types/webfontloader": "^1.6.35",
    "angular-resizable-element": "^7.0.2",
    "angular-split": "^16.2.1",
    "angular-svg-round-progressbar": "^11.0.0",
    "angularx-qrcode": "^16.0.2",
    "d3-axis": "^3.0.0",
    "d3-format": "^3.1.0",
    "d3-geo": "^3.1.0",
    "d3-scale": "^4.0.2",
    "d3-selection": "^3.0.0",
    "d3-zoom": "^3.0.0",
    "date-fns": "^2.30.0",
    "date-fns-tz": "^2.0.0",
    "element-resize-detector": "^1.2.4",
    "fuse.js": "^6.6.2",
    "intl": "^1.2.5",
    "lodash-es": "4.17.21",
    "marked": "^4.3.0",
    "masonry-layout": "^4.2.2",
    "moment": "^2.29.4",
    "mousetrap": "^1.6.5",
    "mutationobserver-shim": "^0.3.7",
    "ng-recaptcha": "^12.0.2",
    "ng2-nouislider": "^2.0.0",
    "ngx-clipboard": "^16.0.0",
    "ngx-color-picker": "^13.0.0",
    "ngx-dynamic-hooks": "^2.1.0",
    "ngx-image-cropper": "7.1.0",
    "ngx-infinite-scroll": "^16.0.0",
    "ngx-markdown": "^16.0.0",
    "ngx-ui-tour-core": "11.0.5",
    "normalize-scroll-left": "^0.2.1",
    "nouislider": "^15.7.1",
    "perfect-scrollbar": "1.5.5",
    "popper.js": "^1.16.1",
    "prismjs": "^1.29.0",
    "purecss": "^3.0.0",
    "resize-observer-polyfill": "^1.5.0",
    "rxjs": "~7.8.0",
    "scroll-into-view-if-needed": "^3.1.0",
    "seamless": "^1.4.1",
    "swiper": "10.3.1",
    "text-mask-core": "^5.0.0",
    "tinycolor2": "^1.6.0",
    "topojson-client": "^3.1.0",
    "tree-model": "^1.0.7",
    "tslib": "^2.3.0",
    "webfontloader": "^1.6.28",
    "what-input": "^5.2.12",
    "zone.js": "^0.14.6"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "16.2.10",
    "@angular-devkit/core": "16.2.10",
    "@angular-devkit/schematics": "16.2.10",
    "@angular-eslint/eslint-plugin": "16.3.1",
    "@angular-eslint/eslint-plugin-template": "16.3.1",
    "@angular-eslint/template-parser": "16.3.1",
    "@angular/cli": "^16.2.10",
    "@angular/compiler-cli": "18.0.0",
    "@angular/language-service": "18.0.0",
    "@babel/core": "~7.22.19",
    "@babel/plugin-proposal-decorators": "^7.23.2",
    "@babel/preset-env": "^7.22.15",
    "@babel/preset-typescript": "^7.22.15",
    "@commitlint/cli": "^17.0.2",
    "@commitlint/config-conventional": "^17.0.2",
    "@commitlint/prompt-cli": "^17.0.0",
    "@custom-elements-manifest/analyzer": "~0.5.7",
    "@mjhenkes/postcss-rtl": "^2.0.0",
    "@nx/cypress": "17.0.3",
    "@nx/eslint": "17.0.3",
    "@nx/eslint-plugin": "17.0.3",
    "@nx/js": "17.0.3",
    "@nx/storybook": "17.0.3",
    "@nx/workspace": "17.0.3",
    "@open-wc/testing": "^3.1.6",
    "@rollup/plugin-alias": "^4.0.0",
    "@rollup/plugin-node-resolve": "^15.0.1",
    "@rollup/plugin-terser": "^0.4.3",
    "@rollup/plugin-typescript": "^11.0.0",
    "@rollup/plugin-virtual": "^3.0.1",
    "@schematics/angular": "16.2.8",
    "@storybook/addon-a11y": "7.5.3",
    "@storybook/addon-essentials": "7.5.3",
    "@storybook/angular": "7.5.3",
    "@storybook/blocks": "7.4.1",
    "@storybook/components": "7.4.1",
    "@storybook/core-events": "7.4.1",
    "@storybook/core-server": "7.5.3",
    "@storybook/manager-api": "7.4.1",
    "@storybook/preview-api": "7.4.1",
    "@storybook/theming": "7.4.1",
    "@storybook/types": "7.4.1",
    "@storybook/web-components": "^7.5.1",
    "@storybook/web-components-webpack5": "7.5.3",
    "@torque/eslint-plugin": "12.0.0-build.25",
    "@types/cors": "^2.8.6",
    "@types/csso": "^5.0.0",
    "@types/express": "^4.17.13",
    "@types/jasmine": "~4.3.0",
    "@types/jasminewd2": "~2.0.9",
    "@types/marked": "^4.3.0",
    "@types/morgan": "^1.9.2",
    "@types/node": "18.16.9",
    "@types/ramda": "^0.28.12",
    "@types/request": "^2.48.4",
    "@types/tinycolor2": "^1.4.6",
    "@typescript-eslint/eslint-plugin": "5.62.0",
    "@typescript-eslint/parser": "5.62.0",
    "@web/dev-server-esbuild": "^0.3.0",
    "@web/test-runner": "^0.13.31",
    "autoprefixer": "^10.4.16",
    "cem-plugin-readonly": "^0.0.5",
    "cem-plugin-vs-code-custom-data-generator": "^1.4.1",
    "chalk": "^4.1.1",
    "conventional-changelog-cli": "^4.1.0",
    "cors": "^2.8.5",
    "cross-env": "^7.0.3",
    "csso": "^5.0.0",
    "eslint": "8.52.0",
    "eslint-config-prettier": "9.0.0",
    "eslint-plugin-import": "2.29.0",
    "eslint-plugin-jasmine": "^4.1.0",
    "eslint-plugin-jsdoc": "46.8.2",
    "eslint-plugin-prefer-arrow": "1.2.3",
    "eslint-plugin-rxjs": "5.0.3",
    "eslint-plugin-storybook": "^0.6.15",
    "execa": "^5.1.1",
    "express": "^4.18.1",
    "git-grep": "^0.1.0",
    "glob": "^8.0.3",
    "husky": "^8.0.3",
    "jasmine": "^5.0.0",
    "jasmine-core": "~4.5.0",
    "jasmine-marbles": "^0.9.2",
    "jasmine-spec-reporter": "7.0.0",
    "karma": "~6.4.0",
    "karma-chrome-launcher": "~3.1.0",
    "karma-coverage": "~2.2.0",
    "karma-jasmine": "~5.1.0",
    "karma-jasmine-html-reporter": "~2.0.0",
    "karma-spec-reporter": "^0.0.36",
    "karma-teamcity-reporter": "^1.1.0",
    "lint-staged": ">=14.0.1",
    "lit": "^2.2.6",
    "lit-html": "^2.2.0",
    "morgan": "^1.10.0",
    "ncp": "^2.0.0",
    "ng-mocks": "^14.11.0",
    "ng-packagr": "16.2.3",
    "npm-run-all": "^4.1.5",
    "nx": "17.0.3",
    "nx-stylelint": "15.0.0",
    "patch-package": "8.0.0",
    "pixelmatch": "^5.3.0",
    "postcss": "^8.4.31",
    "postcss-aspect-ratio": "^1.0.2",
    "postcss-clean": "1.2.0",
    "postcss-import": "15.1.0",
    "postcss-preset-env": "9.2.0",
    "postcss-url": "10.1.3",
    "postinstall-prepare": "^2.0.0",
    "prettier": "2.7.1",
    "purgecss": "5.0.0",
    "ramda": "^0.28.0",
    "react": "^16.14.0",
    "react-dom": "^16.14.0",
    "replace-in-file": "^6.3.5",
    "request": "^2.88.2",
    "rework": "^1.0.1",
    "rework-mutate-selectors": "^2.0.0",
    "rework-pure-grids": "^2.0.1",
    "rimraf": "^3.0.2",
    "rollup": "^3.19.1",
    "rollup-plugin-copy": "^3.4.0",
    "rollup-plugin-delete": "^2.0.0",
    "rollup-plugin-shell": "^1.0.9",
    "rollup-plugin-styles": "^4.0.0",
    "scss-bundle": "^3.1.2",
    "sort-package-json": "^2.6.0",
    "storybook-design-token": "^3.0.0-beta.6",
    "style-dictionary": "^3.8.0",
    "stylelint": "^15.10.3",
    "stylelint-config-idiomatic-order": "^8.1.0",
    "stylelint-config-standard-scss": "^11.0.0",
    "stylelint-declaration-strict-value": "^1.10.4",
    "stylelint-scss": "^5.2.1",
    "tailwindcss": "^3.3.3",
    "ts-morph": "^20.0.0",
    "typescript": "5.4",
    "uglify-js": "^3.16.1",
    "verdaccio": "^5.0.4",
    "webpack": "5.88.2",
    "yargs": "^17.5.1"
  },
```


### Anything else?

_No response_