Searching the Shortcuts app on the iPhone for “watch” displays several actions for control of the watch but none to give a haptic alert.
Maybe you could use the Workout action to start a workout on the watch - if there are any that can give a haptic alert?
I have dabbled with the Shortcuts app for other purposes - it is a very frustrating way to do programming but there are surprising abiliities:
There is a related discussion here (without referring to Shortcuts):
https://www.reddit.com/r/AppleWatch/comments/r84ltq/how_to_get_haptic_alerts_for_things_on_outlook/