The ‘Vibrate Device’ action has had a hidden parameter that can produce 9 different haptic and sound patterns on Apple Watch (Playing haptics | Apple Developer Documentation) since at least iOS 14.
Since the parameter cannot be accessed directly from the Shortcuts app, you can copy the preconfigured actions from this shortcut instead: https://www.icloud.com/shortcuts/c3d657ace0414f54aec4226c8c6aacab
Great hack 
Dog knows what else is hidden 
hey wow! great work, this is something ive wanted for a while especially as the vibrate action on Apple Watch actually makes reference to selecting different patterns
my stainless steel series 6 sure does feel gutless though, even with prominent haptics turned on
hopefully next years redesign takes things to a new level
blow my wrist away apple
Nice one, mate. That’ll be fun to muck with.
