No short on PPDCIN_G3HCompare voltage and resistance to ground (diode mode) at LDO outputs for both CD3215 chips.
Don't forget to check for short, or low value at PPDCIN_G3H.
Will be better if you have known good board, to compare all values.
No short to gnd on that line. Using a good 87W charger and cable.If you don?t even have PPDCIN check for a short on that line. Also for sure known good 87 watt USBC brick and cable? Also ports aren?t badly corroded?