Why not just getting the changes/extensions upstream, welcome the Mac dev on the team, and make it an official port?
I am sure the Notepad++ team is perfectly fine focusing on Windows expertise and has no interest in bringing in the overhead of another OS. If a serious macOS expert wants to do that, they can fork the project with a different name.
BTW look at the GitHub issues. This is a lazy developer creating a slop project. It would be stupid to bring this incompetent and dishonest person on board.