This still isn’t true for Twitter like platforms like the ones OP mentioned, you see only posts from people you follow, in chronological order. If it’s not on by default, you can very easily turn it on from the main screen, and from my experience it never reverts.

I had the opposite experience with X: it would frequently reset my view to "for you". I ended up writing a tampermonkey script to work around it until I gave up on X altogether-and I do the same for platforms like YouTube. Bluesky, on the other hand, hasn't repeated this problem at all.