I am sooooo anxious for the introduction of triggers and actions for the HMS modes. Since its release, the HMS has been quarantined from all automation rules and routines.
But, there is hope that this is still being developed:
All the requests to open the HMS up to automation are within the Wishlist. You can search there and find specific topics that will cover this.
You are using Android, so this would work for you, but is a bit complicated to set up. I currently have my HMS fully voice and shortcut button automated. I have Alexa Voice Commands for: I’m Up, I’m Leaving, I’m Home, Bed Time. I also have a home page shortcut icon for Disarm, Home, and Away.
Since the Disarm, Home, and Away functions of the HMS can’t be executed by any rule or routine, a third party app is needed to simulate all the clicks you would be performing to accomplish these functions. I use MacroDroid to do this.
I have shared some of these macros here:
If you are interested in going that route, I can give you some starters. It isn’t perfect and still has some issues that need to be ironed out, but I am steadily making progress.