First of all, welcome to the forum!
This project is hopeless.
U5260 is not the big problem here.
Liquid around C9580/81 could mean leakage occured from PPBUS_G3H to SSD,through U9580.
You have a pure short on PPBUS_G3H; still same after removing C9580/81?
If yes, check resistance to ground on all big coils; including L9580/81.
USB-C connector is not interesting, until you eliminate the short from PPBUS_G3H.
The connector must be changed; if you finally get the board booting (very unlikely).
This project is hopeless.
U5260 is not the big problem here.
Liquid around C9580/81 could mean leakage occured from PPBUS_G3H to SSD,through U9580.
You have a pure short on PPBUS_G3H; still same after removing C9580/81?
If yes, check resistance to ground on all big coils; including L9580/81.
USB-C connector is not interesting, until you eliminate the short from PPBUS_G3H.
The connector must be changed; if you finally get the board booting (very unlikely).