A:AnswerYes. There are a variety of soundbar mounts that will work with this TV mount. I have a Sonos Ray mounted to mine with a Sanus Sonos Ray mounting bracket. Worked just fine and was easily added.
A:AnswerYou can search here:
https://manuals.plus/best-buy-essentials/be-msfm-full-motion-wall-mount-for-19-50-tvs-manual/amp
It’s very easy to install.
A:AnswerI actually put this on the outside of the wall but it sets out about 4 inches the small TV so I think it’s actually meant to sit in a specific place I think it’s the dimensions of your set back imite Then the actual Bracket itself you should be fine, it’s very very inexpensive and works well, I highly recommend using this bracket.