There aren't events for Matis Only or Fyros Only, though.
There are events where the Matis government or the Fyros government plays a major role, but everyone is invited to all those events. It's just that most players seem to decide "oh, it's a Matis event and I'm not Matis, so I don't care". But there's nothing stopping anyone from showing up.
Even the government meetings are only very rarely private, and usually public, so there's no need for official ambassadors, everyone can already show up to them and be privy to exactly what's happening in the governments. People just choose not to.
But yes, if you want a Hominist council, you should just start one! The Event Team often adapts to what the players do, but the players have to take the initiative themselves to get a response from them. There used to be no Zoraï-government either, until a bunch of Zoraï got together and made an unofficial one. After they persisted long enough, it was made official.
There are events where the Matis government or the Fyros government plays a major role, but everyone is invited to all those events. It's just that most players seem to decide "oh, it's a Matis event and I'm not Matis, so I don't care". But there's nothing stopping anyone from showing up.
Even the government meetings are only very rarely private, and usually public, so there's no need for official ambassadors, everyone can already show up to them and be privy to exactly what's happening in the governments. People just choose not to.
But yes, if you want a Hominist council, you should just start one! The Event Team often adapts to what the players do, but the players have to take the initiative themselves to get a response from them. There used to be no Zoraï-government either, until a bunch of Zoraï got together and made an unofficial one. After they persisted long enough, it was made official.