So I had to not only remove the homepods from my home, reset them, install them back into my home, but then finally realized that the Siri language settings were MISSING from the homepod settings. Tried a ton of stuff, but I think what worked was disabling Siri completely on the homepods, erasing Siri history on the homepods, restarting them (not resetting again), enabling Siri on the HomePod setting and finally I saw the language and voice choice on my homepods again. Multi user support worked from that point. No joke, I spent hours on this to finally get it working. Not the best user experience I’ve ever had. ?