99% sure I’ve tested this with my ugreen 65w folding plug charger and had success. Am certain I would have checked because I have an older mains powered 10-port Anker usb charger that I use for all my cycling gadgets and it won’t work with exposure. (Now discontinued but is here: https://www.amazon.com/Anker-10-Port-Charger-PowerPort-iPhone/dp/B00YRYS4T4)
I’ll double check with my GaN one again soon, but unless I come back and say otherwise then it definitely works.