Google says that it is possible to update XR to iOS17. Apple employee told me that it is possible also. I watched and followed tutorials on how to update OS but I still couldn’t find the iOS17 update installer. I even followed the instructions on beta.apple(.)com but still couldn’t find the installer. Now I’m stucked at 16.7

Why do I need to update? Planning to buy a watch. Please help this clueless man.