Hello! I realize soon is relative and it will never been “soon enough” for those anticipating this feature that I really wish we would have baked in when we launched these cameras but I am super glad the team is implementing it now (finally). From what I can tell the team is working to get RTSP into our most popular cameras codebase first and has quite a backlog but still making great progress. I did read internally that dev team started incorporating RTSP code for v4 last month (Jan) and planned to start internal testing too.
Unfortunately, I do not know if Wyze has plans for an official HA integration but RTSP is a great way to integrate with HA and other platforms. I can tell you that I was a first hand witness that Wyze really does listen and care about their users (like you) when the unofficial HA integration was overloading our API servers instead of blocking them to shut it down (easy path) we worked with the unpaid volunteers to help keep it running.