Looking through the forums a bit further I found this: GPIO issues in Jetpack 6.0 with Linux 36.3
So apparently the issue is that we cannot dynamically switch between input and output anymore and all pins default to input mode. I also found the pinmux spreadsheet in the meantime, but it only mentions Jetson AGX Orin, not Orin Nano. Is it still applicable? More concretely: What exactly do I have to do to configure pins as output pins on Jetson Orin Nano with JP 6.x?