I understand what you mean. It is rather confusing for me as well. On stream they first said about the "in-game achievements" and that they will become account-wide. But since these in-game achievements are directly linked with PSN trophies, they also later mentioned that PS5 trophies will sync. No more information on that.
I wrote in the original post what they've told about "in-game achievements" that will definitely trigger trophies popping on PS5 list. But, since there are seemingly limitations (like skyshards and lorebooks, for example), I decided to post that, so you could set your expectations accordingly. Most probably, not every trophy from PS4 list will autopop following Update 33, but I hope ZOS will prove me wrong.
Sorry again for the confusion.