Hello @Rob Lane !
Welcome to Microsoft QnA!
When you see the matrix and read the info below , i realize that No and NOt Supported express the same thing
The only thing i can think off is that SQL 2022 does not install on Server 2012 so we have simple 'No"
and the reverse situation is that the OS does not support the SQL , and we get "Not Supported"
It is the same conclusion from a different point of view!
I hope this helps!
Kindly mark the answer as Accepted and Upvote in case it helped!
Regards