Having the page dropdown in the same area as the layers is rather frustrating.
I’m not sure what benefit there is to that setup. I think, ideally, the “pages” should just be another tab
This would be way clearer and faster to work with, you could easily see what tab you are on, and the pages list would then be full height with less scrolling.
Having the pages overlay the layers is kind of annoying and also it looks so similar to the layers at a glance that it’s not a great UX.
If you insist on keeping the pages in the layers panel, please consider putting a transparent overlay over the layers when the page menu is open so it’s more clear that the pages menu is open.