BeagleBone AI: How to achieve 30fps with 1080p

I’m using BeageBone AI with latest image AM57xx 12.2 2023-10-07 with no gui

And when I open camera (using OpenCV) I get the following frame rates:
30fps - 640x480
15fps - 720x1280
6fps - 1080x1920

I don’t understand what’s wrong with my board, since the official document says that the it should support 1080x1920 at 60fps !
Had I misunderstood the documentation ?

Would be glad for any advice. Thank you