Couldn't you use something like GitLens for that? I haven't used it in a bit but IIRC it lets you see your changes versus any branch pretty easily. Personally if I do feel the need for a view of what I've touched, I just open up a draft PR.
You certainly can, I specifically like being able to see it in real time though. It’s less useful if it isn’t constantly present without having to bring it up with a click/command.
