As suggested above, I would try Infuse player. I recently switched from a Kodi/Jellyfin setup to an Apple TV/Jellyfin setup and I’m extremely happy with it. Infuse has a free trial, and then you can choose to pay a few different ways (they do have a rather expensive lifetime option, but it might be worth it). The Infuse app has no trouble playing directly from my Jellyfin server, no transcoding, even for full 4K Bluray rips, and yes it even supports Dolby Vision (which the native Jellyfin app struggles with). No hiccups, no issues with multiple audio tracks or subtitles, it’s just buttery smooth direct playback.

It also has a couple different ways of interacting with your Jellyfin library, so it feels completely seamless to me.