For now you can only use it if you run your own n8n community edition server because n8n has not verified it yet. I submitted it to be verified and I'll update this post when/if they do verify it.
@garym77, does that command work from a Terminal window? You should run it there first so you can see if the command gives an error.
Also, you should make the voice word something like creality so you can say "Alexa, turn on creality" after you enable the Triggercmd Smart Home skill.
@Russ Got it sorted. I created a "toggle" in HA and I simply had an automation that turned the toggle back off (after 5 seconds) and it executed the command again.