dudu-lai
You're right sorry. I only got my head unit recently so I assume the AC UI was old before I saw this thread.
Anyway I've reported this but a while ago. Rear defrost and sync button doesn't open the overlay. Rear defrost does register though and I can see changes in the UI/overlay and sync doesn't register at all. The files below are for this problem.
Another note is that I can control both temperatures but the left dial changes the temperature on the right in the UI, the right dial changes the left so vice versa. Any options to reverse/switch the values?
These may seem like minor annoyances but the screen covers my AC screen so I have to rely on the AC ui lol.

https://streamable.com/p79peo