To people asking why Stewart would make a show for Apple in the first place, in some circles Apple is seen as a basically ethical company. I won't comment on whether it's valid to see them this way, but they make a lot of comforting noises regarding privacy and green tech. Plus, being what amounts to a broadcaster, one might expect them to keep their hands off shows being made for them.
What I find interesting to think about is, if China is able to apply pressure on Apple concerning shows made for them, what kind of pressure could they have over TikTok?
From what I remember of the original announcement, there were a couple of other topics that Apple also found it annoying that Stewart might cover, and one of them was the things companies are calling AI. NYT source: https://www.nytimes.com/2023/10/19/business/media/jon-stewart-the-problem-ends.html