Issue with CH340 USB-to-Serial Converter Not Creating Device Files on Jetson Orin Nano Super

[KevinFFF]

I would suggest you updating kernel config in defconfig and built it into kernel image.
After replacing the kernel image on the devkit, zcat /proc/config.gz | grep CONFIG_USB_SERIAL_CH341 should shows CONFIG_USB_SERIAL_CH341=y at least.