I tried to watch some of the stuff they were heavily promoting, but couldn't get into them. Shining Girls is really bad. Tehran, a 3rd-party adaptation from Israel, is Netflix-grade trash that strains one's ability to suspend disbelief. Adding Glenn Close, an elderly American WASP, as a Mossad agent, did nothing to make this weird Israeli propaganda vehicle more believable.
Anyway these are all matters of taste but objectively I believe Apple TV+ has very few subs, which was my main point. It doesn't seem like a massive advertising opportunity.
Severance is really good, you should watch that. I've also heard good things about Ted Lasso and For All Mankind. I'm trying to finish WeCrashed, which has some great unsympathetic performances, but it's been a grind.
There's an uncanniness to Apple TV+ productions. They have gorgeously high production visual quality, in comparison to Netflix's notoriously flat and cheap affect, but most of their programming does seem mediocre story-wise.