My FaceID stopped working. I cannot %100 relate it to the update itself, but after the update, I also enabled the unlock with watch, after one day, I decided it

My FaceID stopped working. I cannot %100 relate it to the update itself, but after the update, I also enabled the unlock with watch, after one day, I decided it it not for me and disabled it. After that my FaceID entirely stopped working. I have removed face id to add it again, but cannot add it back, it keeps saying "move iphone a little lower". Tried everything short of resetting to factory defaults and nothing has worked yet.