MAY10
Looks like this is a national deal, rather than targeted. I hope its helpful for someone!
Terms & Conditions
$10 off your shop offer is valid only when you shop via shop.coles.com.au and spend $150 or more in one transaction. Valid after savings and discounts and excludes smoking and tobacco products. Discount is applied when you enter the promotional code MAY10 at checkout. Offer is valid on your next qualifying order placed until 11:59pm AEDT May 16 18 2021. Orders modified outside of the promotional period will not have the discount upheld. Order cut-off times apply (incl. 1am Sat/Sun in some stores on weekends). Visit shop.coles.com.au for standard terms and conditions.
stacks with other coles codes for maximum discount:
https://www.ozbargain.com.au/node/622816