Something like this?

https://www.amazon.com/gp/product/B001PB7UVA/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

There are a lot of variations of this thing out there.

I don't have experience installing - we almost went this route, then decided a large enough media console would look better and be more practical than an on- or in-wall solution. But, it's very well rated.

It looks much cleaner if you use thiskit to run the cables.