Angular Universal仅渲染router-outlet，SSR内容不显示求助

4天前我在Stack Overflow发布了《Angular Universal rendering only router-outlet》的提问，但未获得回复，现再次求助。我已通过谷歌搜索相关资料，查看了多个Stack Overflow相关问题，仍未找到问题根源。

当前Angular Universal服务端渲染时，仅能看到以下内容：

<app-root _nghost-sc17="" ng-version="14.2.0" ng-server-context="other">
<router-outlet _ngcontent-sc17=""></router-outlet><!----></app-root>

控制台及终端均无报错信息。以下是相关配置代码：

server.ts:

import 'zone.js/dist/zone-node';

import {APP_BASE_HREF} from '@angular/common';
import {ngExpressEngine} from '@nguniversal/express-engine';
import * as express from 'express';
import {existsSync} from 'fs';
import {join} from 'path';

import {AppServerModule} from './src/main.server';

// The Express app is exported so that it can be used by serverless Functions.
export function app(): express.Express {
  const server = express();
  const distFolder = join(process.cwd(), 'dist/food-recipe-front/browser');
  const indexHtml = existsSync(join(distFolder, 'index.original.html')) ? 'index.original.html' : 'index';

  // Our Universal express-engine (found @ https://github.com/angular/universal/tree/main/modules/express-engine)
  server.engine('html', ngExpressEngine({
    bootstrap: AppServerModule,
  }));

  server.set('view engine', 'html');
  server.set('views', distFolder);

  // Example Express Rest API endpoints
  // server.get('/api/**', (req, res) => { });
  // Serve static files from /browser
  server.get('*.*', express.static(distFolder, {
    maxAge: '1y'
  }));

  // All regular routes use the Universal engine
  server.get('*', (req, res) => {
    res.render(indexHtml, { req, providers: [{ provide: APP_BASE_HREF, useValue: req.baseUrl }] });
  });

  return server;
}

function run(): void {
  const port = process.env['PORT'] || 4000;

  // Start up the Node server
  const server = app();
  server.listen(port, () => {
    console.log(`Node Express server listening on http://localhost:${port}`);
  });
}

// Webpack will replace 'require' with '__webpack_require__'
// '__non_webpack_require__' is a proxy to Node 'require'
// The below code is to ensure that the server is run only when not requiring the bundle.
declare const __non_webpack_require__: NodeRequire;
const mainModule = __non_webpack_require__.main;
const moduleFilename = mainModule && mainModule.filename || '';
if (moduleFilename === __filename || moduleFilename.includes('iisnode')) {
  run();
}

export * from './src/main.server';

tsconfig.server.json:

{
  "extends": "./tsconfig.app.json",
  "compilerOptions": {
    "outDir": "./out-tsc/server",
    "target": "es2019",
    "types": [
      "node"
    ]
  },
  "files": [
    "src/main.server.ts",
    "server.ts"
  ]
}

routes.ts:

{path:'', component:HomeComponent, children: [
    { path:'home', component:HomeFrontComponent},
    { path: 'recipes', component:IndexRecipeComponent},
    { path: 'recipes/:strCategory', component:IndexRecipeComponent},
    { path: 'recipe-detail/:id', component:RecipeDetailComponent},
    { path: 'blogs', component:IndexBlogsComponent},
    { path: 'blog-detail/:id', component:BlogDetailComponent},
    { path: 'privacy', component:PrivacyComponent},
    { path: 'about-us', component:AboutUsComponent},
    { path: 'contact', component:ContactComponent},
  ]},

我还下载了一个Angular SSR示例项目测试，同样存在仅显示router-outlet、无法看到meta标签的问题。我的后端使用NestJS，若需更多代码请告知，恳请各位提供帮助。

内容的提问来源于stack exchange，提问作者Nani Po