I too experienced the loss of my Home App devices on my late 2014 Mac Mini's running Monterey after updating my iPhone and iPad to iOS 16.3 with NO warning beforehand. It's VERY condescending of Jeff W to suggest that the "best path forward" is to contact Apple Support for I contacted Apple Support immediately afterwards and endured a lengthy troubleshooting session with a bewildered (and seemingly poorly trained Support person) with NO resolution provided to date. This is becoming an increasingly frustrating user experience from a company that wants its customers to pay top dollar for their products and then suffer the insulting inability to use them as intended, usually due to either poor planning and rushed release and/or the guise of 'end of life support' with the only offer being to spend more on upgrading to the latest Apple products ( I offer the original HomePod as a shameless example whereby a software update rendered otherwise perfectly expensive working units, unresponsive and dead) Sure, I was offered a new replacement of the original which was unavailable in store but amazingly still in warehouse but I had to pay the original retail price all over again, only to now learn that Apple have released version 2 of this unit for the same price! What a f*cking liberty!!!
Meanwhile I have lost the ability to access my Homes within the app on my Mac Minis as they are unable to be upgraded to Ventura which in itself is not completely true now is it Apple... I have actually updated one of my late 2014 Mac Minis to Ventura successfully using a third party workaround!
If Apple thinks that once their customers are trapped within their 'ecosystem' they'll suffer such arrogance and stay, I would suggest they think again. Should someone at Apple who is empowered to provide more than just lip service and be bothered to follow thru and actually get this issue resolved, my Case ID is: 101917501616.
Failing this, I will have no hesitations emailing Mr Cook and making him aware!