[noop_joe]

I don't know of an internal feedback tool, that's not more general purpose. I think a lot of what you're describing is the-practice-of-software-development. There are Lots of possible solutions, what works best for _your_ team will be somewhat unique to them.

The company I work for [0] provides application hosting which includes automatic preview URLs, that can also be associated with a Github PR. The PR will have a link to the environment, with discussion below. Subsequent releases to the environment also get registered with the PR so it's easy to catalogue and annotate developments/fixes.

0. https://noop.dev