After unpairing apple watch in xcode, I also had the issue that I was never able to see it again in Xcode until I did the following.
Completely delete Xcode including deleting following files (chatgpt suggested, check before deleting)
~/Library/Developer/Xcode
~/Library/Preferences/com.apple.dt.Xcode.plist
~/Library/Caches/com.apple.dt.Xcode
~/Library/Developer/CoreSimulator/Devices
Afterwards I deactivated and activated developer mode in iphone, and started new project. Watch became visible.
Topic:
Developer Tools & Services
SubTopic:
General
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