I think this is a much requested feature which is still sadly missing. Having no control over top sites could be very annoying for a user. As an example, I like to set them manually to my most visited websites, and not have them bookmarked. This way I choose their positions to the ones I am most comfortable with and have top websites grouped together in larger icons. I understand that some people might like this being automatic, but this could be solved by 1) allowing us to make custom cards with our chosen websites. 2) allowing us to edit them as in google chrome which would “set them in stone”
I agree It is so frustrating not finding my links/websites I used to because I didn’t bookmarked them or have to look everywhere in my bookmark folder.