Triggering an Alexa routine from a shortcut automation?

We live in a blended (HomeKit/Alexa) household. I have some Aqara mini switches which, despite what Aqara says, don’t seem to appear in Alexa. They show up fine in HomeKit, however, and I have them successfully triggering actions with lights, Kasa outlets and Levoit air filters (the latter via Homebridge).

What I’d like to do is use a switch to trigger an Alexa routine (“Alexa, play WFMU from TuneIn on the Everywhere group”). I can’t find a clear way to do this using HomeKit or Homebridge. Has anyone found a way to trigger Alexa routines via a shortcut automation?

You might be able to do this with Home Assistant. There’s an Alexa custom component that can send commands to an Echo. This is also assuming you can get the Aqara switches to show up in Home Assistant.