Can I wear my head covering in my biometric photo?

No you are not able to wear any head covering, as your face must be clearly visible for a facial image to be taken.

If you wear a head or neck covering for religious reasons, you must make sure that your face can be clearly seen from the bottom of your chin to above your eyebrows, including both cheeks. If possible, both ears should also be uncovered. You might also have to remove your glasses.

You will not be in public view when your facial image is taken, and you can ask for someone of the same gender to take your facial image and scan your fingerprints.