I've noticed that you use Let's Encrypt but the whole site is available via HTTP and search engines list HTTP version. I've found about HTTPS version by manually typing it. I suggest forcing users to use HTTPS as HTTP is horribly insecure.

Here's the .htaccess for Apache:

RewriteEngine On
RewriteCond %{HTTPS} off
RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI}