Did some googling to see what was around - not a lot open around there on a Sunday evening.

This place looked nice and is open Sunday nights: https://www.estebanrestaurant.com.au/ Their menu labels GF, vegetarian and dairy free options, which is enouraging.

I thought this place looked good too: https://alphadining.com.au/ Modern Greek cuisine, also labels vegetarian, dairy free and gluten free options.