...There is speculation as to whether prosopagnosia in autistics is separate from the wider phenomenon and may be a direct consequence of the tendency many of us have not to make eye contact nor put much significance in faces and possibly linked to our common need to categorise. I'm on the fence on that one.
I too have thought that some difficulty in facial recognition with autistics might be because we don't 'look' enough. I came up with the thought simply because I suspect that might be the case for me. It's still awkward sometimes but, obviously, is not prosopagnosia.