@bett3r yes you can to all 3 questions, all you have to do is set up what you want to do when you give Bixby a certain command on Bixby Routines, I use it to automate a lot of features on my device
@bett3r while wearing Buds Pro I just say "Bixby, change equalizer to Bass Boost" for example, or "Bixby, turn on ambient sound on" and Bixby does it, it's very simple