My apologies I didnt’ explained the problem.
I have repository A (which is this one / Gh-pages) and repository B (this / Gh pages). I want this and hipotethically N repositories to be rendered on a mother repository, that collects and possibly allow the tag research among all posts in the Schede folder (the post) .
Yes submodules would work great for this. Multiple repos existing as folders in another repo. Submodules are versions at a commit though so you’ll have to update the parent repo with a commit to get the latest child repos