I've noticed places where the UI is lacking blur. Firstly and most importantly, the back animation when you pull from the side of the screen. This bubble should definitely have blur.
Back arrow not having blur effect
Secondly, when in a game, there is a panel I can access from the side of the screen. This panel not only has no blur at all, but also has absolutely no animations, making it a very jarring experience and one I feel desperately needs updating.
Game optimisation/options menu without blur or ANY animations
Thirdly, I think the opening/closing app animation should have background blur as the window comes out from/goes back into its app icon. This would make the UI much more polished and well rounded. I think OneUI 7 is absolutely amazing - I'm only giving constructive feedback!