i hate to say it because i want the update too but they never promised future processor generation support. z690 support was for 12th gen. so if you bought with a bad expectation, just do the chargeback if you're unable to return via normal channels. or eat it and move on. having said that, its ri-god-darn-diculous they aren't. hire some contractors and crank something out ffs.
or release the source code and let the community do the work. its not like the proprietary code is worth anything anymore when the brand, assembled workforce (or lackthereof) and future sales are completely dead