Would you be so kind and give an example of such a tagged block? I had a look at the documentation and only found https://docs.logseq.com/#/page/how%20to%20create%20pages%20i... that does not addresses blocks.

EDIT: OK, it seems that tagging a bullet point also encompasses sub-bullets. I will look at how to create a page that gather blocks tagged with a particular tag.

Thank you for the pointer!