As per the documentation, pools are basically just resource groups to make permission management easier, so they aren’t really supposed to handle anything like that. Maybe look into a RAID setup of some sort or mergerfs if you just need file level pooling.
I gotta say, upon closer inspection Yunohost looks way more elegant and complete a solution than I was picturing. Figured it’d mostly be premade apps ready to install but there’s also built-in LDAP + email, let’s encrypt certificates, integrated security features, the list goes on and on. If the execution is even remotely as smooth as the documentation suggests, Yunohost sounds great!
My go-to is Vampire Survivors! Default runs are 30 minutes long but you can make them as short as 15 iirc all the way to endless. Mindless enough that you can zone out but you can get more involved if you want.