your half right, in cases where USB/M92 (mangled pins and the like) occur, it’s a coin flip whether it will take out the USB “functional block” out or the SoC as a whole. What I can say is in these circumstances, if the diodes are populated on the board, the chances of either scenario are marginally less likely.
To the OP, your readings do seem a little on the low side (if I remember right) , maybe worth pulling the diode/s and seeing if your readings increase to normal (don’t reconnect power with the diodes out of circuit until you verify no other issues)
So the filter for me always shows open line in diode mode when 5v charging rcm mode don’t work.
I would personally remove both diode arrays. I think they say dug on.
I might be wrong on this so someone with more knowledge which me better, but I think the MOSFET at the top of the board above m92 might be connected.
(I haven’t tested this, I’ve just read it somewhere.)