Autonav with custom header tag

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Hi

I have an autonav block and i want to add a h2 tag that can be set within the block editor.

I want to be able to add the same background color behind both the autonav ul and the h2 tag within a div. I know I can create an area in a template and add a class to that and place the h2/ul tags content in there but I don't want to create multiple templates with differently styled areas as the site has 100s of pages.

So, currently I can only style each individual h2 and ul tag. Is there a way to add dynamic calls to the database from the autonav templates so that I can set a h2 tag within the autonav block editor or something like it?