It doesn't seem like Roku has any interest in actually trying to solve this problem based on the posts we've seen from Roku representatives in this thread. They just keep posting the same troubleshooting steps that don't work or referring people to report the issue to Apple, despite the fact that Apple doesn't seem to have a way to report issues with their Roku channel.
If they were actually interested in trying to solve this issue, I think they should look at what some of the common reported problems and configurations seem to be. For one, it seems obvious to me that this issue doesn't affect all Roku users. It may not even be specific to a specific piece of Roku hardware. In fact, I'm pretty sure it's a software bug. People have reported all different kinds of Roku devices, from sticks to TVs.
The common thing I've noticed (and from my own experience) seems to be related to sound. Some have found they can solve this issue by disabling Dolby Atmos and others have found that they can fix it by changing their sound back to TV speakers.
In my own case, Apple TV+ worked fine until I installed the Roku Wireless Speakers. That could be coincidence, except other people seem to have also pinpointed sound related issues causing the problem.
In my opinion, there is likely some kinds of configuration related to sound settings (wireless speakers, dolby atmos, etc.) and AppleTV that don't play nice. The easiest thing for Roku to do would be to try to reproduce this issue themselves using some of the info they received here.
In the meantime, I'll continue watching Apple on my Xbox.
