Currently having a bit of trouble accessing the bootloader logs through the UART. I noticed I was having a similar issue to this person: Jetson AGX Xavier USB Not Detected - #15 by curtissgf53.
After entering “dmesg --follow” and plugging in my usbc connector to j501, there is no change in the dmesg output. The nvidia logo remains displayed on my monitor connected to the jetson xavier agx.