How to setup subdomain for tenants in Django app running in droplet

thanks in advance. I have a Django app using Django-tenants. The app runs well locally but I haven’t been able to solve the subdomain for tenants. So far:

1. I have a public and a test schema with superusers created.
2. I tried all combinations os allowed host, *.mydomain.com, ip, *.www.mydomain.com, now I’m testing with ‘.*’, ‘*’
3. I have a wildcard SSL certificate installed in the server.
4. Currently I have an A record with * pointing to my droplet ip, also tried CNAME.
5. So far I can only access to the top domain of the app, and not to subdmains.
6. Here is the relevant code/conf.

server {
    listen 80;
    server_name *.mydomain;
    location / {
        rewrite ^ http://mydomain;
    }
}

server {
    listen 443 ssl http2;
    server_name *.mydomain.com;

    ssl_certificate /etc/nginx/ssl/mydomain_com_chain.crt;
    ssl_certificate_key /etc/nginx/ssl/mydomain.com.key;

    # SSL/TLS security settings
    ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
    ssl_prefer_server_ciphers on;
    ssl_ciphers 'EECDxxxxxxxxxxxxxxxxxx';

    location = /favicon.ico {
        access_log off;
        log_not_found off;
    }

    location /staticfiles/ {
        root /root/project;
    }

    location / {
        include proxy_params;
        proxy_pass http://unix:/run/gunicorn.sock;
    }
}

Hope someone can help me out. Thanks!!