I bought a Ugreen 65W charger months ago and I just checked the specs, 20V and 3.25A. Ugreen is probably one of the top 3 most sold brands for these kind of things. I also checked other (USB PD) fast chargers by them and Baseus, they all are above 18V @ 2A, so I don't think there's really any issue here other than the author not having a single charger that meets that requirement.