Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature currently requires accessing the site using the built-in Safari browser.
If you are still using CentOS 7.9, it's time to convert to Alma 8 with the free centos2alma tool by Plesk or Plesk Migrator. Please let us know your experiences or concerns in this thread: CentOS2Alma discussion
I never did full backup restore (didn't have need to do so), only subscription backup (one domain), but you can try to go on: Home>Tools & Settings> click on xml file, select what you need (i guess everything) and try like that.