Aside from the pointer being a stupid circle, I really haven’t felt limited by the mouse on iPadOS. When you say “actual“ mouse support, can you give me some examples?
For me, this means full support for the Magic Mouse 2 and the Magic Trackpad 2. Not being able to scroll with gestures just feels wrong. I’m sure others have their own wishlists though. But I agree that other than that, mouse support as it is is pretty good so far. (For me at least).