I just released the version 1.6.0 of this plugin that renders the svg images in a different way in order to support links.
I updated the GitHub Readme with an example on how to create link to other notes and external links.
@xardbaiz give it a try and let me know if you are able to create the links you are asking for
In joplin both syntax are supported:
The syntax with
:/<noteId> is not actually a valid URI syntax so it does not work if you create an anchor tag:
joplin://<nodeId> is a valid URI where the protocol is joplin.
Is the @startgantt supposed to work?
It appears to be not...