

Idea on how the Miraculers can learn about the Kingdom
The Miraculers don't know about the Kingdom, this organization works in the shadows away from their side but they obviously need to learn about it at some point and I have an idea how.
You see the members of the Kingdom are all called: The [Name, usually reffering to something about the person on any given place, for example Tomoe is the Machine as she creates high tech machines].
We know that rich and powerfull people that we saw in the series are a part of it like Audrey, Noé or Tomoe, this means that a lot of the members are likely rich people that we already know of.
In Season 5 episode 22 "Collusion" Gabriel calls André the engenieer of Paris, what if by "The Engenieer" he was refering to not just him being the one who decides on the state of the city as the mayor but also to his position in the Kingdom.
It is very similar to the names that the Kingdom members have, what if it is one?
In the same episode André steps down from being the Mayor which would likely be the same moment he steps down from his place in the council.
So if André knows about the Kingdom then he can tell about it to Zoé who will tell it to Ladybug who will inform at the very least Alya about it and possibly the whole team (She tells it instead of Vesperia because that could accidentally reveal her secret identity).