What problem does this address?

When typing text and creating content, we usually just have the sidebar open by default. With headings, the only way to tell their level is to hover the block and see what level it is.
So as I'm typing, when I don't have my mouse hovering over to see the menu, there's no way for me to see which heading it is...

What is your proposed solution?

It would be extremely helpful if we could visually identify the level of headings while typing with a simple indicator in the sidebar. This could be done for example by appending H2 to the block-title in the sidebar card, or any other method that just helps us identify things without having to take our hands off the keyboard, point/hover the mouse to the heading and reveal the toolbar.

Current	Suggested