I thought this was fairly doable for some time. Surprised it hasn't been an issue before.
I used to do tech support for a school district with some ~5000 Chromebooks in circulation and we did all of our repairs in house. This meant I spent the first few weeks of COVID bringing home boxes of damaged devices and spare parts and getting them back into working order. Occasionally I would have to do a board swap for a bad power jack or something which meant you would have to overwrite the serial number on the new board to match the old one so that it would join Google admin as one of our devices. If I remember right the process would have worked the other way around too, to change the serial number to one we didn't control.
I used to do tech support for a school district with some ~5000 Chromebooks in circulation and we did all of our repairs in house. This meant I spent the first few weeks of COVID bringing home boxes of damaged devices and spare parts and getting them back into working order. Occasionally I would have to do a board swap for a bad power jack or something which meant you would have to overwrite the serial number on the new board to match the old one so that it would join Google admin as one of our devices. If I remember right the process would have worked the other way around too, to change the serial number to one we didn't control.