How to accept request with port after domain in nginx

I have a subdomain https://test.shop.com, I'm running a Nginx server and it's working fine. But I have to accept the request with https://test.shop.com:8080/graphql/ and redirect to http://127.0.0.1:8000 to the same machine. I've added this block

    location /graphql/ {
       proxy_pass http://127.0.0.1:8000;
    }

But when I try to access https://test.shop.com:8080/graphql/ from the browser it shows me This site can’t be reached seems something to do with dns. Although I can access https://test.shop.com/graphql/ and it works fine.

My whole config file is

    server {
    server_name test.shop.com;
    root /var/www/html/test;
    index index.html;
    location / {
        try_files $uri $uri/ /index.html?$args;
      }
        # dashboard app
    location /dashboard/ {
        try_files $uri $uri/ /dashboard/index.html?$args;
    }

    location /graphql/ {
       proxy_pass http://127.0.0.1:8000;
    }


    listen [::]:443 ssl; # managed by Certbot
    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/test.shop.com/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/test.shop.com/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot

}
    server {
    if ($host = test.shop.com) {
        return 301 https://$host$request_uri;
    } # managed by Certbot


    listen 80;
    listen [::]:80;
    server_name test.shop.com;
    return 404; # managed by Certbot
}