A:AnswerYes they thought ahead with this controller/phone clip and it has two different controller clips in the box the xbox one and the xbox series x/s controllers
A:AnswerAs there is no 3.5mm port on the Switch Pro controller, it will not work with that, but you plug it directly into both systems. It emits really good sound in both cases.
A:AnswerAs long as there's a 3.5mm port available on your controller and it doesn't protrude and get in the way of your othe peripherals, yes. You will be fine.