Locate the charger IC which will be used to drive these DCIN mosfets.
That is, ACDRV pin of the charger IC will supply the BOOSTed voltage onto the GATE of the measured mosfet. Only if the gate is DCADAPTER voltage + 6 volts = ~25 volts on the GATE, then this mosfet will enable - else will be OFF.
Locate the charger IC and share the SMD markings - probably a TI BQ series.
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