If your site shows a "Site Currently Unavailable" message, don’t panic. Start...

https://andressuniquechat.cloudhinter.com/posts/site-currently-unavailable-after-i-updated-wordpress-how-to-diagnose-and-fix

If your site shows a "Site Currently Unavailable" message, don’t panic. Start by checking your DNS settings to ensure your domain points correctly. Also, verify file permissions to avoid 403 errors blocking access