Amnesia
In my observation you are wrong on the Not only Fyros or not only Matis part as when i tried to vote for the new Akenak you have to be a Fyros Patriot to do so. so in that way it excludes all other. so it is Fyros ONLY.
yes, the elections are for citizens only. That's only natural.
Similarly, only Tryker citizens can become Taliari and Matis citizens Nobles, if they meet the requirements for it (meaning certain guild rank and no more than 2 per guild). The Zorai have a similar limit.
But everyone can show up at meetings and watch/listen. It's just expected that those not part of the assembly refrain from interrupted, certainly those not citizens, and/or ask permission to speak first.
This is no different from when you go to the visitors' gallery in your real world government when it's in session. Unless you petition to speak through official channels you're expected to not interrupt or you can be removed.
Or with elections setting restrictions on who can run and vote.