Basic nginx server_name setup issue (redirect url)

Question

I am getting used to the nginx web server app. I have always had problems setting up the different server_name in the nginx conf file usually situated on /etc/nginx/sites-enabled/

What I did is I have setup up the server so it can display more then 1 web server at a time. I currently have default and thecanadiansos config file.

If the user enters : thecanadianssos.com in the browser, it says it can't reach the server ip. If the user enters : w.thecanadiansos.com in the browser, it goes to the default nginx page.

The user must write : www.thecanadiansos.com in the browser for it to works. ( the https seems to work well)

How must I setup my thecanadiansos nginx config file to fix everything? The systax is ok and the site is working but the file might have mistakes I tried many solution and couldn't find the issue alone. Here is what I currently have hope you can help, thank you :)

server {
    server_name thecanadianasos.com www.thecanadiansos.com;
    root /var/www/thecanadiansos;

    index index.html index.htm index.php;

    location / {
        try_files $uri $uri/ =404;
    }

    location ~ \.php$ {
        include snippets/fastcgi-php.conf;
        fastcgi_pass unix:/var/run/php/php7.4-fpm.sock;
     }

    location ~ /\.ht {
        deny all;
    }


    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/www.thecanadiansos.com/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/www.thecanadiansos.com/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 ($host = www.thecanadiansos.com) {
return 301 https://$host$request_uri;
}

    listen 80;
    server_name thecanadiansos.com www.thecanadiansos.com;
    return 301 https://www.thecanadiansos.com$request_uri;
} ```