Afterpay Arena food and parking

Hi. I’m going to the “new” stupidly named Afterpay Arena at Sydney Olympic Park tomorrow for a concert along with my teen daughter and her friend. Has anyone been there for a concert since it was revamped? If yes, what the food is like there now?
Also, the main act doesn’t come on til 9pm. Support is on at 8pm. When should I get there to park in (prepaid) P1? I don’t want to get there too early as there isn’t much to do there and we are driving back home afterwards…