The Pixel 6 and Pixel 6 Pro are the first Google devices to use an optical under-display fingerprint sensor. These work by illuminating the spot where you place your finger so that the camera under the screen can see your fingerprints.
Many users have already found that some tempered glass screen protectors may interfere with the operation of the fingprint sensor, likely because the extra layer of glass causes too much internal reflection for the optical sensor to get a good look.
Your best guarantee for getting a screen protector which won't negatively impact the fingerprint sensor operation is to stick to products which are certified under the Made for Google program. These have been tested by Google to confirm that they will fit and function correctly. This 9to5Google article has a listing of specific products and where you can buy them.
Screen protectors from other companies might work, but if you stray from the Made for Google certified products I would definitely double-check the product description to make sure it is compatible with the fingerprint sensor. At least then you might have some recourse if it doesn't work correctly.
Many users have already found that some tempered glass screen protectors may interfere with the operation of the fingprint sensor, likely because the extra layer of glass causes too much internal reflection for the optical sensor to get a good look.
Your best guarantee for getting a screen protector which won't negatively impact the fingerprint sensor operation is to stick to products which are certified under the Made for Google program. These have been tested by Google to confirm that they will fit and function correctly. This 9to5Google article has a listing of specific products and where you can buy them.
Screen protectors from other companies might work, but if you stray from the Made for Google certified products I would definitely double-check the product description to make sure it is compatible with the fingerprint sensor. At least then you might have some recourse if it doesn't work correctly.