OK, it turns out there are two different ways to do this but it’s a little awkward and the set up is time consuming. So it can be done, but I don’t know if it will be worth the effort to do it.
- use the IFTTT service’s maker channel to receive a Web hook as the “if” in an IFTTT applet and then make smartthings the “that.”
@rscott09 had shared a how to article on this about six weeks ago, but to be honest, I had forgotten about it. My bad.
- use the free yonomi app to trigger Logitech Harmony Activities
If you have a Logitech Harmony hub integrated with SmartThings, you can get the free yonomi app and then they have a pretty nice UI feature to set up a Siri shortcut to fire a Harmony activity.
Setup is still clunky because you have to create a Harmony activity (probably using virtual switches) to do whatever you want SmartThings to do, but it can certainly be done.
So either of those methods would let you create a Siri shortcut for anything that you can trigger from a virtual switch coming on in SmartThings.
Again, more trouble than most people will probably want to do, but it is possible and some people, particularly those who have to rely on voice, may find it useful. 