There are numerous settings that sound the same like Spoiler Axis, Spoiler Set, Spoiler A. None of them work. The only one that does is specifically called “Speed Brakes Set”. You have to search for it. It doesn’t show up in the default settings.
And I’ve found that even with that one set, the speed brake lever on the Bravo won’t always make it move in sim. If I move my Bravo lever, notice that it’s not moving in sim and then go to manually move it with my Quest controller, it will often jump to the position on the Bravo suddenly and then it will work when I move the Bravo lever. I also got my TOGA button working in the tutorial but then it stopped working in later flights even though I’ve verified that the controller settings are still there.