This would definitely be helpful. Thanks.
I hadn’t seen this post when I made this request recently: Indent driven auto heading creation mode
Part of the issue I think might be deciphering which heading level your are at after the fact. Identifying the size or counting up to 3 hashtags is easy, but after that it requires a little more focus.
Maybe both for this and my request it would, for example, temporarily show “H6” rather than 6 hashtags, at least while editing. This would be similar to the way certain themes change to the pills for tags while in edit mode. But maybe, only while in this mode the hotkeys would work. This would open up the convenient keys like tab or arrows.
I love headings and hope they will be a little easier someday. It won’t take much.