Well yes that’s partially it (65W), but it should also be able to use the battery and the power adapter at the same time. Because in that sense, NO power supply is strong enough to supply both the 7940HS and the 7700S at the same time under full gaming load, so what the laptop does (and what we see in practice) is that it sips from the battery, especially in load peaks - hence peoples batteries are draining when gaming even when plugged in.
However it might not be able to do that for me for some reason.
My electronics background isn’t particularly strong so maybe it’s as simple as no two sources can supply to one sink at the same time, i.e. sources are battery and PD, and sinks are battery, socket and expansion bay.
So in my config, PD can charge battery and supply socket at the same time, but PD and battery can’t work together to supply the socket.
For a dGPU setup, PD can charge battery and supply both socket and dGPU, and if the PD is insufficient, it can switch to using e.g. PD for dGPU and battery to supply socket.
That doesn’t quite match what we see however, in that it only sips from battery, whereas in that theory it would use a lot more battery and the PD would be largely underutilised.
So I don’t see why my setup couldn’t reach peak power with a 65W charger. Maybe somebody from the framework team can chime in?
As I finished writing this, I found this thread which might give more clues: