Series 5 Watch bricked during WatchOS 9 update
Hi! I have a Series 5 Apple Watch that didn't survive the update to WatchOS 9.
Immediately following the attempted update, the watch face showed watch and iPhone icons moving back and forth and the iPhone said I need to recover Apple Watch ("there is a problem with this Apple Watch that requires it to be updated or restored"). The recovery process starts OK but always reverts back to the unrecovered state.
I have tried restarting the watch (and iPhone). I have tried resetting the watch by holding the crown button for 10 seconds followed by the side button for 20 seconds, but nothing happens. I have tried removing the watch from the iPhone but can't because the iPhone can't connect to the watch.
After all of this, I noticed that the watch no longer appears as one of my devices in Find My Devices.
Is there anything else I can try to resurrect my Apple Watch?
Apple Watch Series 5, watchOS 8