Running nuxt.render(req,res)

i want to run nuxt v3.11.2. but i don’t now nuxt.render is undefined in that version. I put the code inside file index.js. The code is in below

import main, { createHttpService } from "@tinqjs/tinjs-boot";
import express from "express";
import { build, loadNuxt } from "nuxt";
import cors from "cors";

const isDev = process.env.NODE_ENV !== "production";
const app = express();
app.use(cors());

main.default(async () => {
  const nuxt = await loadNuxt({ dev: true });

  if (isDev) {
    await build(nuxt);
  }
  app.use(nuxt.renderer);

  const listen = createHttpService(app);
  listen(3001, () => {
    console.log(`Service frontend nuxtjs ready`);
  });
});

i want to run in custom server function.