TrueDepth camera not working after water damage, any hope?

So, while I was at the Dutch quadrennial hackercamp MCH2022, I unfortunately dropped my phone in the water while swimming. Usually not such as big deal, well, except that I had gotten my battery replaced a month prior. I had it done at Apple officially, hoping that it would still be water proof (I knew very well that it might not have been, but they didn't tell me and I kind of expected the official repair to still retain waterproofness, but ah well). Well in any case, it did get water damaged.

Now that I'm home, I'm attempting to see if I can salvage the phone (replacement already bought for the time being and it was insured anyway), and I got it working nearly perfectly again (just need to clean the volume up button), just not Face ID (the TrueDepth camera).

I'm not scared of a challange, and my insurance already covered the damage anyway. My contract is ending late August, and September is new iPhone month as well. So I'm not really too concerned if I break it further, would be a shame obviously but not the end of the world. So I figured, is there any hope I can get FaceID to work again? It's still the original sensor anyway.

Fun fact: during the water damage, the battery got reported as non-original, but now that it's opened and I've cleaned the connectors etc. it's reporting as an original part again.

Edit: too few details, here's some more:

• Settings -> Info -> Face ID "Problem" message
• Front camera is working fine
• Message "Face ID is not available" popped up
• Then I made the stupid decision to reset the Face ID settings, leaving them grayed out. Performing a recovery restore now.

Edit 2: more testing, the dot projector isn't working.