Swiftfin works fine. It was a little clunky to set up because you need to go through the apple beta software app, but I’ve been using it months with no major issues.
They link to a commercial app for the AppleTV. It’s totally worth the $0.99/month until they get the official Swiftfin version working.
Pay for Emby, it’s a more polished jellyfin.
Someone else in this thread mentioned "Infuse" as a useable frontend.
Infuse is great, but they have a subscription if you want to play some media format. Quite cheap IMO and they have great apps for all Apple devices.
I have used infuse with emby, it works pretty well however I still prefer the Emby app to it for ease of navigation.