I understand! I know there is a lot of hype about Discord, especially young people love it. Despite all the features, isn’t Discord just a chat software? Reading your answer, I think you are looking for a forum software (not chat) 😄 Have you looked at Discourse? It is open source, offers a modern, hierarchical structure with categories and subcategories, extensive permission systems and role management. It is specifically designed for larger communities and allows easy management of moderators and admins.
Folks, don’t be fooled by another centralized bullshit.