Have you tried creating shortcuts from the iPhone "Shortcuts" app? These can be triggered by Apple Watch.
Example:
I created this basic Rule Machine 4.0 rule
- Trigger: Cloud endpoint
- When triggered: Set the dimmer in my bedroom to 1%
I have this shortcut on my iPhone
- Shortcut name: Bed Time
- 1 action: Networks: Get Contents Of (https://cloudendpoint-from-my-hubitat-with-a-RM4-rule)
On my Apple Watch
- I just say "Hey Siri, Bed Time" and she says "Ok" and runs the shortcut on my phone. It closes just like any other alert on my watch.
This took about 5 minutes end-to-end to setup. The WAF is higher than ever with her Apple watch. We've been using this since iOS 13 for the past year. I expect this would still work with iOS 14 but haven't checked yet.
Link to info on the Apple Shortcuts app: Run shortcuts with Siri, the Shortcuts app, or Siri Suggestions - Apple Support