Installing AlmaLinux from Archlinux

I have my partitions seperated for /var/www and /home which I ideally dont want to touch on the install process and simply replace the root from arch to alma. Is this possible due to SELinux constraints? If this is possible does almalinux support ZFS?

I would do minimal install initially, without creating regular account, so that as little is created into those paths. Then seek ZFS drivers. If I would get the system to mount ZFS somewhere on boot first, then handle the “get things mounted where they should”.

Do you have allocatable disk-space, or do you have to remove some Arch volumes to make space?