I have passed through CDG passport control four times in the last ten days or so. The EU line seemed to move fairly swiftly, but only on one occasion was the non-EU queue short; the other times it was long, mostly taking 30 minutes or more to get through. Despite various signs asking for proof of vaccination status to be shown I was never asked for this, just my UK passport (check in was a different story).

To add to comments above about dual nationality, I generally only use my US passport to enter and leave the US, and use the UK one for almost everywhere else. I am not certain, but this may partly explain why I was not asked about my destination, purpose of visit etc.

On the final occasion through CDG I noticed a separate “fast track” line ("Accès no.1" ? ), which I was allowed to use since I was travelling in CE. I was through in less than a minute, regretting that I had not noticed it before.