When buying from Coles Woolworths are any of Australian non halal shops look for the vegetarian/vegan logo at the back of the product.
some of the products have halal label as well.
for products that does not have halal or vegetarian/vegan label check the ingredients. below is the list of emulsifier that are vegetarian.
https://vegvic.org.au/food-additives//
https://simplifyvegan.com.au/additives/
https://simplifyvegan.com.au/products/?shop=Woolworths