First, find the site in the panel where you want to configure HTTPS and click Settings:

Select Let’s Encrypt as the second certificate from the Let’s Encrypt TAB.

After selecting the domain name and filling in the email address, click “Apply”, the key and certificate as shown in the picture below will appear, indicating that the certificate has been applied and can be accessed using HTTPS:

In this case, HTTP is still available. If Forced HTTPS is enabled, the system forcibly switches to HTTPS.