Iphone 12 pro charging
I have purchased the iPhone 12 pro. Can I charge this phone with my MacBook 61W power adapter?
iPhone 12 Pro, iOS 14
Yes. See the following from Charge your iPhone with an iPad or Mac notebook power adapter - Apple Support
You can use Apple USB power adapters for iPad and Mac notebooks to charge iPhone, iPod, Apple Watch, AirPods, and other Apple products.
Also see: Fast charge your iPhone - Apple Support