Well I already have jellyfin running in a container, just have to figure out how to get mum's TV to work with it I guess
log in on a local IP and not the network name and it's working again. but I'll be moving to jellyfin from now
unfortunately i have no idea about the apple ecosystem. the ios app is smooth. i hope you can just download it and test it somehow on your apple tv.
jellyfin supports several user accounts for friends and family.