I do not understand why this dolphin version is on another site? That makes no sense! For example drupal has core version, 5, 6, 7, 8, 9, each with its modules, is a very good model.

It is very simple to create new modules and add to each core version, and it is very easy for users to search for modules for each one, but here if I'm looking for an older version modules is impossible

Why not organize them in a way to be easily found by users?