I'm trying to identify a component on a GoPro Hero10's PCB.
It measures 1x1mm and appears to be a UDFN-4 package (or similar). It is grouped with one capacitor and doesn't have an obvious connection to a larger IC.
I have highlighted all relevant traces I could identify. The board is an HDI PCB with about 10 layers and blind/buried, plugged micro-vias, which makes things difficult.
The connector on the right is for the GoPro's front screen, the one right next to the long red trace is for the USB port.
The test point above the component in question appears to be connected to a via which would end here if it went straight through all layers (it most likely doesn't):
Here's an overview showing the PCB in its entirety from both sides:
Here's a close-up of the chip in question:
I'm not sure what kind of component this could be, which makes searching for it really difficult.
Does anyone have an idea what it is?