Please create an integration for Sonos to Home Assistant. I don't understand why you would be this horrible and lock your system down so much? Please at least allow the community to create a home assistant integration for config management and custom voice commands. This is really unbelievable that this is not a thing still.
I don't like being this negative about it, but you're making my speakers worse and worse since I bought them and I'm seriously considering just selling all the Sonos products I already have and moving away permanently from anything Sonos. Stop pushing so hard for gimmicks no one really wants and get your core products to actually work.