This shows the sizes of iPhone screen but it does not show the size of the CarPlay screen

Yes, I have an urgent need to know the dimensions of my screen. But it's not an initial problem. In my CarPlay application I am using CPGridTemplate. In my design I have to use 8 buttons that are aligned 4 buttons per row. According to the documentation, this is the default behavior. However, it is not working like this. I have filed this problem but have not got any response yet https://developer.apple.com/forums/thread/726487 Hence, the only option to move my buttons is to add empty spaces, I'm need to satisfy 2 rows in various different screen sizes. That's why I have to calculate screen dimensions to know how many empty spaces I need to add. Ofc, adding empty spaces seem ridiculous, but this is the only working option right now