To add HTTPS it is exactly the same as HTTP did. You may check here for existing post.

If HTTP assigned into port 80, then HTTPS assigned into port 443.

• Protocol : HTTPS
• Source Domain/IP : Your domain.tld
• Source Port : 443
• Destination Port : 443
• Destination IP : same as your local IP

Then we install certbot to make a free SSL.

dnf install epel-release -y
dnf install certbot python3-certbot-apache mod_ssl -y
certbot --apache

If you wish to renew, then just need to run

certbot renew

Please remember to setup Vhost configuration first.