like:

nested tag is not referenced to the parent tag but it will just appear in to the unlinked references section
like:
now i think i understand why there is no direction link between them, because if i want to read about "parent tag"s like to read just about them not their Childs. still but still I think a section that shows the “parent directory” is cool.
As I know, there is no nested-tag(Hierarchy tag) function in Logseq now.
Sorry, I have to take what I said yesterday back. There is hierarchy tag function in logseq now, although it’s a little complicated. You can use ‘’’#tag1/tag2/tag3’’’ to make the hierarchy tags.