Is there a way to make a https post with only port 80 in nginx config file?

So, I a have Django app which needs to send data to an API.
I am using request to send the data.
First, it was warning me that -in short- I am not using SSL for sending the JSON data.

To solve this I added "verify=PATH TO THE CERT FILE"

requests.post(url, json=payload, verify='\fullChainCert.crt')

After this I got 200, so I was happy.

Question is, will it work like this on server?

Port 443 is open on server, but only 80 in nginx config file.

You can configure the nginx.conf file to work with https 443 port and redirect traffic coming to port 80 to port 443. A simple https configuration looks like this:

server {
    listen 80;
    server_name yourservername.com or your_public_ip;
    return 301 https://$host$request_uri;   
}

server {
    listen 443 http2 ssl;
    listen [::]:443 http2 ssl;

    server_name yourservername.com or your_public_ip;
 
    # You should create the ssl certificates and use them here
    ssl_certificate        /etc/ssl/certs/nginx-selfsigned.crt;
    ssl_certificate_key    /etc/ssl/private/nginx-selfsigned.key;
    ssl_dhparam /etc/ssl   /certs/dhparam.pem;

	location / {
        proxy_pass http://django_app;
	    proxy_set_header Host $host;
	    proxy_set_header X-Real-IP $remote_addr;
   	    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
	    proxy_set_header X-Forwarded-Proto $scheme;
    }
}