Iron Man Already Proved The Existence of Illuminati in MCU's Main Timeline
During Iron Man 2, there was a scene where Stark's phone had a folder labeled...
Which already confirmed the existence of the group but...
It was never followed up until Doctor Strange 2.
It wouldn't be surprising if Tony was involved with The Illuminati...
Since he had that folder.
The biggest question after this revelation is...
How has the Illuminati stayed hidden all this time if they do exist on MCU's Earth as well.