Using Joplin in a logseq-like way?

[muzak]

This plugin may suit your needs: Plugin: Extract Paragraphs

Here is a post from the plugin developer relevant to you wanting a block-centric approach:

Plugin: Inline Tag Navigator [v2.0.1, 2025-01-26]

The extract paragraphs does mostly what you want - can scan through one or all notebooks and only pull out/extract the text blocks that have the the tag all on one page (it's block oriented like Logseq linked references - not the whole page). It's not fully dynamic - but can do what you're saying manually on demand.