FaceID has stopping working - have taken all steps and still erroring

After the last software update was released, I have had persistent problems using FaceID in that it is not recognised. I’ve restarted the device, reset FaceID and redid it - that was problematic as well as it didn’t recognise my face was very clearly in the boundary marks.

After resetting FaceID, it worked for a couple of hours - and same problem is now being experienced.

iPhone 14plus running latest OS.