In HSM under Configure automatic arm/disarm there's an option " Use buttons pushed to arm/disarm".
Create a virtual button, add it to the option above, and then add it to your dashboard. You might have to set it up as two tiles: one for arm and one for disarm. Not sure about that.
The other option would be to create a virtual switch, then set up an RM4 rule to arm/disarm based on the switch state. You could do that with just one tile.