Double Tap
I thought the "Double Tap" feature only works with the Apple Watch Series 9. I have a SE, first edition and it works for me with that watch.
Apple Watch SE
Question marked as
Your watch doesn't have the hardware to do the double tap of the new series 9 and Ultra 2 Watches.
Have you actually set up an Assistive Touch feature?
M1 Mac mini, macOS 14.1; Watch, series 7 GPS/cellular, watchOS 10.1; iPad Pro 2nd Gen, iPadOS 17.1; iPhone 12 Pro, iOS 17.1; TV 4th Gen, tvOS 17.1; HomePods, audioOS 17.1 and Airport Express w/ Airplay 2