I assume !newcommunities@lemmy.world is for just that, and promoting new instances is unacceptable there. Where is an appropriate place to advertise a new instance?

Asking for one that is not my own. Decentralization is cool and I literally just found out about the existence of https://fanaticus.social/, a sports instance, from checking the !olympics@sh.itjust.works sidebar. I'd like to help this sports instance get attention and bolster its existing communities. I don't know where to go besides finding big preexisting sports communities and mentioning its existence there.