You won’t be able to raise the issue at the AGM unless there’s a Motion on the Agenda to do so, and whilst I’d be pleased to draft something for you there’s no point if the Agenda has already been distributed.
So what about contacting your Strata Manager ASAP to find out if the sunshade has been approved, to confirm that the area where your neighbour parks is common property and, that if so, there’s no license or exclusive use by-law covering its use, and if it’s too late to add a Motion to the Agenda, – and then come back.
You’re in NSW right?