Right. Having an own machine 24/7 online and setting up wireguard to it does not sound very typical.

I use pass myself and I don't care about mobile. But I really don't know what to recommend family members.

I use pass also on my phone in combination with Termux. I keep the passwords stores in sync using git. pass on android also supports copying your password directly into the clipboard, which is especially nice on a mobile device.

My family members are all with iPhones, and their Passwords is very good. I only backup a couple of sensitive passwords to my pass store just in case. The rest of the passwords are basically disposable.