You can't disable the Bixby button on the Galaxy Note 9

The Bixby button has been a polarising topic ever since Samsung introduced it on Galaxy S8 models last year. One of the first things people sought to do with the dedicated assistant button, was (of course) to remap it to perform a different function. Something useful, like launching the camera app, or whatever else, but Samsung was quick to release a software update that prevented this (at least temporarily).

But although Samsung didn't offer any customization of the Bixby button out of the box, people who were fed up with accidentally pressing the button when using their phones ...

Source PhoneArena https://ift.tt/2N9oxQp
via Seoandserver