The damage is quite severe and has affected the surrounding pads and traces. I am looking for a schematic, boardview, or a high-resolution reference photo of this specific area to identify the values of the nearby capacitors and resistors that were also damaged.

Has anyone successfully repaired this rail or can provide a partial schematic/pinout for this "AUM" chip on the Mini 3 Pro board? Any help with component values in this area would be greatly appreciated.

I just bought a DJI mini 3 pro that turns out to have severe water damage (it's a little complicated, but I'm not too disappointed). Shockingly, it mostly works (no errors, only the rear right motor has a little more resistance than the rest so it can't quite fly); the previous owner didn't even know it was water damaged. It's been at least a week since it got wet, likely much longer. I'm going to follow this tutorial to clean off the motherboard, replace the ESC entirely, and probably follow the same steps for the camera module (is this safe?). However I have a couple questions:

1. What is that white stuff? It seems to have been used to glue some of the connectors, but whoever did this obviously didn't actually fix the water damage.
2. Should I do anything extra/differently because it's been corroding so long?
3. Can I do anything for the motors (flight and gimbal)?
4. Are there any listings for the thermal paste on amazon that could arrive quicker with prime? I couldn't find any.