How can I create an Apple Shortcut that runs on iPhone, iPad, Mac, Watch, and HomePod?

Here's my views on create a universal Apple Shortcut : 

1. Create the Core Shortcut:
- Use the Shortcuts app on your iPhone or iPad.
- Keep it simple with actions that work on most devices (like sending messages or making calls).

2. Adapt for Different Devices:
iPhone and iPad:
- Add it to your Home Screen for quick access.
- Use Siri to trigger it with voice commands.
Apple Watch:
- Keep it simple and use Siri to activate it.
Mac:
- Use the Shortcuts app on your Mac.
- Use Siri or keyboard shortcuts to trigger it.
HomePod:
- Use Siri to trigger it with voice commands.

Suggestions:
- Keep it simple: Focus on actions that work on most devices.
- Test it: Make sure it works on all your devices.
- Use Siri: It's the best way to trigger Shortcuts across devices.

If you need any specific help there we are here to help you.