For the few of you who still have SmartThings access and either aren't interested in running the node-http-sonos-api or are waiting for the Raspberry Pi supply shortage to ease, I've just released a bridge solution to some of the issues discussed in this and a few other threads with a Sonos Replica driver for HubiThings.
I became involved with HubiThings Replica as a tester while it was in Alpha and tackled this project after some other discussions piqued my interest.
For what it's worth, I'm still very much an advocate for an updated Hubitat integration, and nobody's ever going to pry my node-sonos-http-api away from me 
