The first wireless Powercore was no development effort, threw together a weak charger and weak wireless loop, and then see if it sells.
If there’s this new one, then that could indicate the first one sold well enough and feedback was… (PD in…).
The Qi and the PD standards are viewable, as are the chip designs if you can find a tear-down.
The Qi standard states the negotiation is one time, the phone decides from what is offered how much it takes. So the phone decides its own overheating. So one phone could decide to get itself hot and the poor pad transmitter had to lump it. That means Anker has to either offer a low Wattage or must invent a thermal throttle. Anker has always done thermal cutout, if too hot it turns off, but they not yet done thermal regulation where it turns off and turns on at a lower power and when cold then turn off and turn on at a higher level. That logic I doubt is here yet.
PD version 3 with PPS does allow for thermal throttling at either end but PD 2 doesn’t so it would need the logic added.