Is it possible to downgrade from WatchOS 10 to WatchOS 9?
WatchOS 10 is a garbage update. Not sure what Apple was think but is is possible to downgrade?
Apple Watch Series 7
take you Apple Watch into an Apple Store and ask them to send it back to Apple to have it downgraded to watchOS 9.
But that is a short term strategy, as eventually, your iPhone will upgrade to a version that requires a newer watchOS version, and you will be forced to upgrade your Apple Watch again.