In my case I went for a decoy that's PD and QC compatible, the
ZYPDH. It has the following specs:
100W 5A USB Type-C Decoy PD 2.0 3.0 TO 5V 9V 12V 15V 20V DC Trigger Adapter Module QC4 QC5 Charge Charging Notebook
Can't post links, look it up on Ali
Soldered the Wii U connector to the decoy, used the charger and USB-C cable from my Xiaomi 11T that's QC3 and voilá... The charger can provide up to 67W and the cable is rated for 6A, although the same cable for some reason can't provide 12v, it provides 9 and 15. For that reason, for the consoles that need 12v (like the GC and Wii), I used a Switch Pro Controller USB cable than CAN provide 12v with the same charger.
The PD protocol seems to be more limited than QC.
Ended up making a bunch of those adapters for my consoles, I been using them for 1-2 monts without any issues.