The toilet also made this probably made it like this something is also wrong with it to make it like this
There are a few things that could cause Face-ID to stop working, as well as a number of things that you can try to fix it.
To try and fix your device yourself:
You can read more solutions here.
If you are still having problems, it may be due to a hardware issue or the toilet.
I would contact Apple Support or book an appointment at an Apple Store.
Hope this helps.