Hi @louis before the "big merge" @MMN-o (official maintainer) will review the changes in the notabug fork.

GNU.io had some issues when we were re-activating development and thus we just temporarily moved to notabug. Despite that, this is an official GNU social continuation, otherwise it wouldn't be on https://www.gnu.org/software/soc-projects/ideas-2019.html#social

This repository is under active development and our latest stable release was v1.20.9. @MMN-o is aware of all this effort and we have consistently been mentioning him in every release information on !gnusocial and chatting about the changes in the #social IRC.