One thing to keep in mind is that the Steam Deck will negotiate a maximum of 45 watts of power from the wall. Docks/hubs with PD passthrough (which most are) will NOT negotiate power themselves (as they’d need to provide their own internal power supply for the Deck then) and simply reserve/use a portion of that power budget for themselves. Some docks use so much power for themselves that the Deck can actually discharge under heavy load. I’ve experienced this with some Anker hubs for example.

Note that it doesn’t matter if you have a higher wattage USB-C power supply. The Steam Deck will always negotiate 45 watts (15V@3A) at most.