Googling around it seems there's an update out there already for reassigning of the Bixby button. Checking for updates from my phone says I already have the latest. It's been a long while since I used a Samsung phone... since the S3 to be precise. How do updates get pushed to phones in NZ these days? Is the telco the gate keeper for OTA updates?
I assigned the button when I got the phone out of the box no trouble.
How did you do that? When I look at the "Bixby key" item in config it says "The Bixby key setting isn't available yet..." etc.
I think from memory I had to sign in with a Samsung account, and setup Bixby first, then I had access in the settings to assign the bixby key.