Nginx configuration for Symfony on a sub uri - nginx

Question

I am trying to host two applications under the same domain. One nodejs (nextjs) project and a Symfony application. I was planning to use "/be" sub url for the Symfony application. I was able to setup nginx to route to the respective applications. However I am getting 404 because I cannot replace the "/be" prefix from the request uri while trying to pass the request to the PHP-FPM. I tried replacing the REQUEST_URI fastcgi parameter but same problem persists. Here's my location configurations:
location ~ ^/be/.*$ { # for static files
root /home/ubuntu/be-prereg/public;
# remove /be/ from request url
rewrite ^/be/(.*)$ /$1 break;
# try to serve file directly, fallback to index.php
try_files $uri /index.php$is_args$args;
}
location ~ ^/index\.php(/|$) {
root /home/ubuntu/be-prereg/public;
fastcgi_pass unix:/var/run/php/php7.4-fpm.sock;
fastcgi_split_path_info ^(.+\.php)(/.*)$;
include fastcgi_params;
fastcgi_param SCRIPT_FILENAME $realpath_root$fastcgi_script_name;
fastcgi_param DOCUMENT_ROOT $realpath_root;
fastcgi_param REQUEST_URI '/api/test';
internal;
}
#nodejs
location / {
proxy_pass http://localhost:3000;
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;
}