Wouldn't FTX-US be required to KYC all of their customers? I assumed that was the (part of) the reason why these exchanges had us and non us versions.

(edit links) https://help.ftx.com/hc/en-us/articles/360027668192-Individu...

https://help.ftx.us/hc/en-us/articles/360048666713-Account-T...