Cannot open Nikon Z6III-files

I have a Mac OS Secuoia 15.3.2 and a LrC 12.1 version (Camera Raw 15.1). I am not able to open my lates Nikon files with this version it seems. But at the same time I am not able to upgrade my LrC to the latest version. Im am not given that possibility in Adobe cc, no new updates appears there for me.  Why is that? Can anybody help me out? 

Arne, Norway