A week after we learned that Samsung launched the early access program for Bixby in the United States, the feature is now finally rolling out in the country. Still, only select users have received it and will probably take a few more weeks before it reaches more users.
Bixby Voice was already available in South Korea, where it arrived last month, but in order to get it in the US, you nee to sign-up for the Early Access Program and you need to update all your Samsung apps within the Galaxy Apps store. After that, when you open Bixby, it should prompt you with a setup for Voice.