A:AnswerNo. At least not using any standard VESA wall mount...
If you can find a wall mount that does not require VESA bracket, and works with any generic monitor, that might provide a solution.
A:AnswerThis one is not adjustable. You may want to look into a separate monitor stand. Just double check the monitor stand is designated to accept HP (diff screw locations for each brand).
A:AnswerThis used to work fine on a macbook Air, in Spring 2019 I got a macbook pro and the resolution won't adjust correctly. similarly reported here https://apple.stackexchange.com/questions/297287/external-monitor-screen-too-large