Coincidentally there was a Feature Request just last night for the ability to link to multiple headings using a special syntax as opposed to the interactive iterative approach you temporarily thought might be possible.
Here’s a link if you’re interested in voting for it:
https://forum.obsidian.md/t/support-for-linking-to-embedding-ranges/12347?u=i-d-as
I think it is a cool idea.
Thanks.