404 page is not showing in nextjs after export

I've added a custom 404.js file in /pages directory and it's working fine locally but when I run next export and put all files from out directory to public_html directory in cpanel, everythings is working fine but when I enter wrong path it should go to 404 page instead my web takes me to home page with same link in address bar. For Example: I don't have /about page when I try to go to /about page, my website should show me to 404 page instead it showing me home page (index.html) with /about in address bar.

next.config.js file

module.exports = {
  exportPathMap: async function (
    defaultPathMap,
    { dev, dir, outDir, distDir, buildId }
  ) {
    return {
      "/": { page: "/" },
      "/faq": { page: "/faq" },
      "/how-it-works": { page: "/how-it-works" },
      "/patient-onboarding": { page: "/patient-onboarding" },
      "/privacy-policy": { page: "/privacy-policy" },
      "/terms-of-use": { page: "/terms-of-use" },
      "/searched-pharmacy": { page: "/searched-pharmacy" },
      "/new-customer": { page: "/new-customer" },
      "/404": { page: "/404" }
    }
  },
  trailingSlash: true,
}

using "next": "^10.0.6",

server.js file

const express = require("express");
const next = require("next");
const dev = process.env.NODE_ENV !== "production";

const sitemapOptions = {
  root: __dirname + "/public/",
  headers: {
    "Content-Type": "text/xml;charset=UTF-8",
  },
};

// Create the Express-Next App
const app = next({ dev });
const handle = app.getRequestHandler();
//Start the app
app
  .prepare()
  //Start Express server and serve the
  .then(() => {
    const server = express();
    // serve sitemap
    server.get("/sitemap.xml", (req, res) =>
      res.status(200).sendFile("sitemap.xml", sitemapOptions)
    );

    server.get("*", (req, res) => {
      return handle(req, res);
    });
    server.listen(3000, (err) => {
      if (err) throw err;
      console.log("> Ready on http://localhost:3000");
    });
  })
  .catch((ex) => {
    console.error(ex.stack);
    process.exit(1);
  });

on local showing 404 page

Same path after deployment