Show headings only at specific levels when trying to link

Use case or problem

I have a lot of headings at different levels for different purposes. And I frequently link to specific headings. The problem is that sometimes I only want the dropdown suggestion box to show H1 headings, instead of searching for the keywords at all levels, which is time consuming and also distracting. For example, in this screenshot:

I have H1 headings which are author lists, and there are many H2 headings that I do not want to see. It would be brilliant if I could choose to only see H1 headings.

Proposed solution

I think it should be possible to add an option in the settings so we can choose how many levels are searched. E.g. H1 only, H1-H2, or H1-H3.