Suggestion: Overlay for Code Mirror 6

I have seen hints from Matt and Joen that at some stage the block editor might include the updated code mirror 6 for working with HTML.

I see that Yoast is now using an overlay to show the interface for keywords and description in a pop-up overlay. I like how this works so I suggest that an option like this to view and work on the html of a bock would be ideal. You could make the overlay fill as much of the browser window as possible to give a maximum workspace.