Is there a lot to wait for passengers arrival

Yes, two cell phone waiting lots. One north of the terminal (for the A-side) and one south (for the B-Side). https://orlandoairports.net/parking-transportation/parking/#parking-map

Generally it is . Orlando is a busy airport . We missed our domestic flight even though we were there 1 hr before the departure . Suggestion would be reach atleast 3 hr before your departure

Agreed