Earlier quoted context omitted.
I've been using a GaN-based power supply for my MacBook Pro and it's just as good as advertised. Slightly bigger than a deck of cards, yet it runs cooler than the stock unit. Hopefully this tech finds its way into more devices as it gets cheaper. It would be neat to have GaN based inverters for electric cars.
They work great to charge my Android. One day MacBook chargers may even charge iPhones!
Plug that into the MacBook charger and you’re good. No problem here, is it not working for you?