You will need a bank that does native USB-C Power Delivery to fast charge properly.
This is the one I bought, it says "charging rapidly". It's a great powerbank, I think it has 1 USB-C, and 2 regular USBs. Super well-built
https://www.amazon.com/gp/product/B...ag=hawk-future-20&ascsubtag=UUacUvbUpU5380909