@montag : it's pretty gripping, although not high brow television. It has a conspiracy vibe to it, and the first season asks more questions than it answers, but it's got some thrilling moments too ! If you can see it, it's not a bad investment, although I wouldn't say it's worth the investment on its own.
Apple TV+ has tons of science-fiction, like #ForAllMankind, #Severance, #HelloTomorrow, #See or #Invasion (on top of #Silo and #Foundation which you've mentioned).