I am running into an issue on the BeagleBone Black Industrial Rev on Kernel 5.10 where the ethernet doesnt start up on every boot. I found this Ethernet device is not detecting on ubuntu 20.04 LTS on BBG - #22 by RobertCNelson - Linux Discussions - Engineering and Component Solution Forum - TechForum │ Digi-Key which mentions I either need to use an older kernel, or use a newer board.
https://docs.beagleboard.org/latest/boards/beaglebone/black/ch02.html
In late 2021, there was a HW rev to fix this ETH issue… Have these boards not been updated with these revisions?