Is there any way to get rid of log? (UEFI)

Can you share us a short video to indicate what black screen do you mean?

Please refer to Failed changing boot logo Orin NX JP 5.1.1 - #9 by KevinFFF to update your custom logo. You can simply replace the one on your board to verify instead of reflashing the board.

Please refer to Remove boot logo and add boot progress bar - #21 by KevinFFF and Jetson Orin Nano Developer board: Got error message when trying to flash the bootloader - #15 by KevinFFF for the similar issue. It might be relating to compressing.

We don’t suggest customizing the partition layout file if you are not familiar with each attribute there.