Face ID

Hello! My Face ID recently stopped working. It started off by not unlocking when I would look at my phone, telling me to use my passcode instead. Then, I restarted my phone to see if that would help and it did not. I went to my settings to add more angles for my Face ID and it told me that “Face ID is not available at this time, please try again later”. I then deleted my face out of the phone and tried to add it again but I was greeted with the same message of Face ID being unavailable. Since then, I’ve tried countless times to restart my phone and add my face again but I keep getting the same message. Any sort of help would be great. Thank you!