Google Search Console, Next.js 14.2.15. Issue with the 404 page

Google Search Console reports: Not Found (404) These pages are not indexed or included in Google.

The page is located in the root of the project and is named not-found.js. Here is the code:

import NotFoundPage from "@/components/404/NotFoundPage";

const NotFound = () => {
    return (
       <NotFoundPage />
    );
};

export default NotFound;

Status code check in the browser: Status Code: 404 Not Found

The project is deployed on a VPS using Docker, Certbot, and NGINX.

NGINX Configuration:

server {
   listen 443 ssl;
   server_name domain.com www.domain.com;
   root /usr/share/nginx/html;

   ssl_certificate /etc/letsencrypt/live/domain.com/fullchain.pem;
   ssl_certificate_key /etc/letsencrypt/live/domain.com/privkey.pem;
   include /etc/letsencrypt/options-ssl-nginx.conf;
   ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem;

    location /.well-known/acme-challenge/ {
        root /var/www/certbot;
    }

    set $need_redirect "0";
    if ($host ~* ^www\.(.*)$) {
        set $need_redirect "1";
    }
    if ($request_uri ~* "well-known") {
        set $need_redirect "0";
    }
    if ( $need_redirect ~ "1") {
        return 301 https://$server_name$request_uri;
    }

    location / {
        proxy_pass http://frontend:1010/; 
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;

        error_page 502 504 = @fallback;
    }

    location @fallback {
        root /usr/share/nginx/html;
        try_files /errorpage.html =502;
    }
}