This might be fixed now. I updated to IOS 17.4.1, and updated xcode to 15.3, and now the watch is in the device list again. I dare not unpair it to test. But hopefully optimistic.
cmmmmmmmmmm
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
Post
Replies
Boosts
Views
Activity
I submitted feedback as well for this.
Checking the console, it says the watch is waiting to accept the Trust dialogue box click. It's not showing up on my watch screen! This is new in 10.4!! Please fix!!!
I noticed this behavior as well after upgrading to watchos 10.4
The only solution I've found is to erase the watch and restore it. That will allow it to connect ONCE to xcode. If you unpair the watch from xcode, it will never again show in the list, despite anything you might try, except for restoring the watch again.