I have read this question and realised that it is outdated.
With the most recent android update for my Galaxy S9, I have no way to disable the Bixby button out of the box. Previously I had to sign in to Bixby, Then go to setting and disable the button there. Afterwards I could remove the samsung account and had no issues at all.
How can I get rid of Bixby/disable the bixby button without rooting the device?
Software update: G960FXXU2CSB9/G960FOXM2CSB3/G960FXXU2CSB3
Android version: 9
Security Patch: 2019-02-01
Bixby Home Version 3.0.02.6
Bixby Voice Version 2.1.04.18