如何将 Let's Encrypt 添加的服务器块正确地合并到已经存在的 proxy_pass 服务器块中？

Question

最初，我有一个简单的服务器块作为我的 WireGuard 隧道的代理，但后来我安装了 Let's Encrypt 并添加了自己的服务器块。

一切仍然运行良好，唯一的问题是尽管 Let's Encrypt 添加了 HTTP，但 HTTP 并未重定向到 HTTPS（但如果我在地址中手动输入 HTTPS，HTTPS 确实有效）。

我认为这是因为充当的原始服务器块会拦截proxy_pass之前的请求。尽管我无法以某种方式编辑它，使它们都能按预期工作。

这是我目前拥有的：

# original server block for WireGuard
server { 
    server_name mydomain www.mydomain ;
    location / {
        proxy_set_header X-Real-IP  $remote_addr;
        proxy_set_header Host-Real-IP  $http_host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header Host $host;
        proxy_pass http://10.8.0.22:80;
    }

# added by Let's Encrypt
    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/mydomain/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/mydomain /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 {
    if ($host = www.mydomain) {
        return 301 https://$host$request_uri;
    } # managed by Certbot

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

    server_name mydomain www.mydomain;
    listen 80;
    return 404; # managed by Certbot
}

我可以将两者合并吗？或者这甚至不是 HTTP 未重定向到 HTTPS 的问题？谢谢