Its been mentioned the GPIO can be fed 5v if you wish and like the Pi4 the PD input needs higher potential because of the buck dropout than 5v can not remember if 5.1 or 5.2v min.
GPIO though 5v but same with pi4 the rockpi4 is likely to take more current than the pi1-3 battery modules where designed to supply.
So probably yes but if it has enough mAh, don’t know?
Prob something like these Jack.
But they are set up for pi3 levels of mAh.
I think with those they are dumb/simple and that only pins used are to apply power 5vcc & gnd the rest is just pass through so additional hats cat sit on top.