How do I configure nginx to remove a part of the URI given to index.php

The routing script of my application expects the URI to be

/api/v0/create

My request goes to

http://my-server.test/subdir/api/v0/create

How can I configure nginx to remove the "/subdir" from the URI, providing the expected path to the application's router?

I tried this one, but got only "404 File not found" from the server (not the app):

location /subdir/api/ {
    rewrite ^/subdir(.*)$ $1 last;
    try_files $uri $uri/ /subdir/api/public/index.php$is_args$args;
}

With the rewrite flag break and without the rewrite part altogether I get a 404 from my application for the subdir still in URI.

Edit:

I need a way without redirect to /api for there is another analogue URI http://my-server.test/anothersubdir/api/v0 which would have the same /api part.

All this comes down to the question: Is there a way to configure nginx to give the target application a rewritten URI in a way that for example $_SERVER['REQUEST_URI'] in php reflects it?

Edit: Here is the complete nginx configuration:

nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful
# configuration file /etc/nginx/nginx.conf:

user  nginx;
worker_processes  auto;

error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;

events {
    worker_connections  1024;
}

http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;
    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';
    access_log  /var/log/nginx/access.log  main;
    sendfile        on;
    #tcp_nopush     on;
    keepalive_timeout  65;
    #gzip  on;
    include /etc/nginx/conf.d/*.conf;
}

# configuration file /etc/nginx/mime.types:
types {
    text/html                                        html htm shtml;
    ... omitted
}

# configuration file /etc/nginx/conf.d/php.conf:
server {
    listen 80;
    server_name my-server.test;
    root /var/www;

    location /subdir/api/ {
        rewrite ^/subdir(.*)$ $1 last;
        try_files $uri $uri/ /subdir/api/public/index.php$is_args$args;
        location ~* \.php$ {
            fastcgi_split_path_info ^(.+\.php)(/.+)$;
            fastcgi_pass   php:9000;
            include fastcgi_params;
            fastcgi_param  SCRIPT_FILENAME $document_root$fastcgi_script_name;
            fastcgi_param  SCRIPT_NAME     $fastcgi_script_name;
        }
    }
}

Thank you for helping!

You don't have any location block that will handle the request after the redirect (lets say after the rewrite, your request changes from /subdir/api/v0/create to this /api/v0/create, there's no matching block that will process such requests. I would suggest to take out the nested location block outside, also add the root location block (if needed)

server {
    listen 80;
    server_name my-server.test;
    root /var/www;

    location /subdir/api/ {
        rewrite ^/subdir(.*)$ $1 permanent;
        try_files $uri $uri/ /subdir/api/public/index.php$is_args$args;
    }

    location ~* \.php$ {
            fastcgi_split_path_info ^(.+\.php)(/.+)$;
            fastcgi_pass   php:9000;
            include fastcgi_params;
            fastcgi_param  SCRIPT_FILENAME $document_root$fastcgi_script_name;
            fastcgi_param  SCRIPT_NAME     $fastcgi_script_name;
    }

    location / {
        <REST OF YOUR CONFIGURATION>
    }
}