Area 51 is the Stack Exchange Network staging zone. It's where groups of experts come together to build new Q&A sites that work just like Stack Overflow. Area 51 has its own discussion site, Area 51 Discussions. If a question is only related to Area 51, then you may ask it either here on MSE or on Area 51 Discussions (https://meta.stackexchange.com/a/323571).
Area 51 has its own discussion site which acts as its own meta site. If a question is only related to Area 51, then it may be better to ask it there. However, it is still on-topic here, so you may ask it on whichever site you wish.