I have been asking for this feature for many many years. It is the most basic of features. Currently, internal links (aka bookmarks) are linked to the toc settings. This means it is only possible to share links to an h3 or h4 if h3 and h4 are included in Article Settings > Show Table of Contents. Please provide a method (example could be a paperclip icon) that allows h3 and h4 headings to be shared and linked to without having to enable all h3 and h4s in the toc