This should be already doable in Neo4j Graph View Plugin.
I do not now if it processes tags since I do not use them but it should not be hard for Author @Emile to add support for them since they have relatively simple syntax. They might just need to be ignored from fenced and indented code blocks.
Recognizing relationships with tags is also needed in request Option to define the hierarchical tag structure once and could be used for Show tag-connected notes in right sidebar
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