It’s already possible to link to header (or anchor) in your notes.
What you want is automated anchor for each Markdown item? I’m not sure I see the value added versus manual anchor.
I suppose something could be done with custom attributes extractor to auto add anchor to everything. The indexing should use some form of UUID so it can remain up to date even when content is added in between blocks or moved.
With the coming feature of Lua Script to render function in line, you could have a routine to show a live rendering of the numbered reference in the links to the UUID anchor.