I can’t be sure from what you have mentioned, but I suspect you are out of luck. An extraordinary general meeting is not a forum for discussion. At the meeting, only resolutions submitted before the meeting can be voted on. If you did not submit any motions a couple of weeks earlier (the agenda goes out at least 1 week before the meeting, perhaps earlier if owners don’t accept emails), then you are out of luck. You don’t mention submitting motions to the strata manager or strata committee secretary, so there is no way anything you want to discuss will be brought up. And you have to submit motions to achieve things, not points of discussion. Your mediation will not result in anything changing, I expect.
But you can approach the strata manager and secretary, and ask if they will arrange a forum for owners to discuss things generally? Then submit motions for the next general meeting, that have broad support.