CP2A Carlinkit4.0-it doesn't show full screen in wireless android auto while it does in carplay.
Some Automotive Head Units experience this when using CP2A/CarlinKit 4.0.
The screen screen of wireless CarPlay, full screen
Wireless Android Auto screen, not full screen
Use your Android phone to connect to wireless Android Auto, and use your mobile browser to enter into 192.168.50.2, try to change the resolution to 1280*720 or 800*400, and then observe whether the screen is full screen.