If you’ve installed drivers directly from Intel that are version 14.0 or higher then you will lose the magnification abilities. There’s something in the new driver codebase that breaks the functionality.
There’s nothing you can do about that other than rolling back to your original drivers or only using the 13.x series drivers from Intel.
If you specifically need some feature/bug fix that version 14.x provides, you’ll have to take it up with Sony support. Because the TR is a discontinued model it’s unlikely that they’ll release updated drivers but perhaps they have a work around for you.