Apple watch
Need to erase my information from old apple watch since I have a new one.
Apple Watch Series 8, watchOS 9
Question marked as
See this Apple article -> What to do before you sell, give away, or trade in your Apple Watch, or buy one from someone else
Then remove the Apple Watch from your account, see -> Check your Apple ID device list to see where you're signed in -> Check your Apple ID device list to find where you're signed in - Apple Support