Is there nesting / grouping of repositories in github?

Question

GitHub

I couldn't find it, we are switching to github in the company, and the question arose of creating "folders" of projects.
A project can be large, it can have many repositories, but there are also sub-projects.
To make it clearer, here is an example from kallithea, where you can create groups of repositories

Answer 1

You can create an organization and add repositories to it, but you can't add another organization inside an organization, so they're not exactly "folders".
Example
Unfortunately, there seems to be no other solutions at the moment, correct me if I'm wrong.

Answer 2

Git has a submodules mechanism.
https://git-scm.com/book/en/v2/Git-Tools-Submodules
So you can try to organize a hierarchical structure. But in the github itself, all repositories will still be on the same level.
But as far as I've heard, there are problems in it)))