Family is happy with Matrix (Synapse) and Element as clients. Have members with iOS and Android, smooth experience for all users. But, to be fair, I do have easy users: they basically just send texts, emojis and an occasional picture.

I did not like the admin side of things too much so far, but I recently migrated to a Docker setup, which seems easier to maintain.

Years ago I tried Snipe IT. As your examples seem to be focused on household and grocery stuff, Snipe IT might be overkill, but according to documentation it supports SAML at least.