I am looking into buying an used Thinkpad T470 online code 20JN0009US that according to the description comes with an "ABNT w/ Ç" keyboard.

My personal preference is the US keys / layout. Do you know if the keyboards are compatible? Could I order a replacement US keyboard part and replace the existing BR one easily?

Thanks!

Yup you can change from existing keyboard to US keyboard as well.

Can do some search from eBay.

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F182907462080

The keyboard layout was fully opening , unlike X1 Carbon you need change together with palmrest as well.