Mac Book Air has correct Nikon lens profile, but iMacPro suddenly does not list it

I have been using Lightroom Classic on both my MacBook Air and mainly my iMacPro.

The correct Nikon Z lens has been showing correctly in the list of lenses as:

Nikon AF-S Nikkor 24-120mm f/4G ED VR

But for some reason after a recent shoot the iMac only shows a tiny list of Nikon lenses, and none of them are remotely close to being mine.

I have tried re-installing Camera Raw which hasn't made any difference.

I have also tried looking to find the correct profile on my MacBook Air but I can't find where the mac stores them so no joy there either.

Any solutions?

(Other that delete all the preferences and start again which in my experience never works)

Thank you in advance!