Beyond a post from a Plex Team member that mentions what needs to be fixed…
Plex + ATV 4K 2022 Dolby Atmos (DD+) not working at all - #18 by ChuckPa …then nothing at all.
But basically if you read his posts in the thread then Plex first needs to fill the open vacancy for someone who has a clue about Apple devices.
Then of course the switch to Metal API will NOT be a minor thing.
Just check back in 6 months…optimistically.
Just to clarify that the linked thread isn’t specifically regarding the stutter…but almost every issue on Apple devices is linked to needing Metal API. Including the stutter issue.