Yes, the limitedness of well supported jellyfin apps is one of it's biggest weaknesses in my opinion. Making things like this pick up and play is important for people trying to administer it for others.

Jellyfin on Roku was basically perfect and no harder than any other streaming app aside from perhaps slightly clumsy controls during login. Web and computer App were also nearly perfect. Android app worked fine most of the time but occasionally did something weird. Minor stuff easy enough to troubleshoot, but not ideal if your mom is trying to binge watch her British soaps.