I am trying to serve my Nodejs API using nginx server blocks

My app is running on port 3000, but when try to access my endpoints via my https://site-url, the errorlogs show that i am trying to access static files and i get response from my API,can anyone help me identify the error in my markdown.

#Server blocks for incoming HTTP requests
server {
    if ($host = www.tendaafrica.net) {
        return 301 https://$host$request_uri;
    } # managed by Certbot


    if ($host = tendaafrica.net) {
        return 301 https://$host$request_uri;
    } # managed by Certbot


    # server block for 'tendaafrica.net', 'www.tendaafrica.net' domains
    listen 80;
    listen [::]:80;
    server_name tendaafrica.net www.tendaafrica.net;
    # redirect any HTTP request to HTTPS
    return 301 https://$http_host$request_uri;




}
server {
    if ($host = api.tendaafrica.net) {
        return 301 https://$host$request_uri;
    } # managed by Certbot


    # server block for 'api.tendaafrica.net' domain
    listen 80;
    listen [::]:80;
    server_name api.tendaafrica.net;

    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;
    }


}
server {
    # server block for 'static.tendaafrica.net' domain
    server_name static.tendaafrica.net;
    root /var/www/tenda-main;
    index index.html index.htm;
    location / {
        try_files $uri $uri/ =404;
    }

    listen [::]:443 ssl ipv6only=on; # managed by Certbot
    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/tendaafrica.net/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/tendaafrica.net/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 {
    # server block for all the other requests
    # this block will be a default server block listening on port 80
    listen 80 default_server;
    listen [::]:80 default_server;
    # close the connection immediately
    return 444;
}

# server blocks for incoming HTTPS requests
server {
    # server block for 'tendaafrica.net', 'www.tendaafrica.net' domains
    listen [::]:443 ssl;
    listen 443 ssl;
    server_name tendaafrica.net www.tendaafrica.net;

    # SSL configuration by certbot
    ssl_certificate /etc/letsencrypt/live/tendaafrica.net/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/tendaafrica.net/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot

The nginx server works very well, but my app is not served as it should be served