I have a similar problem to the discussion about bought presets such VSCO but I also can't find the normal camera preset options in Camera Calibration in Develop such as Camera Standard, Camera Portrait etc which corresponds to what I set on my Nikon when I shoot. It is incredibly frustrating. Why does Adobe have to mess around with a fundamental part of the program. Does anyone know how I can get these back?
If you've updated to 7.3 then you won't find them in the Camera Calibration section any more, the new profiles are now in their own "Profile" section at the top of the Basic panel.
I suggest you have a read of this: https://www.lightroomqueen.com/camera-profiles/
Thank you so much Jim! I have just found them after your answer. I will take a look at your link too. I really appreciate your help.