As per this comment, Citibank has launched a cashback program a la Amex, Commbank, Westpac etc.
This one seems targeted as it appeared in my wife’s app but not mine.
Can someone be a guinea pig and see if it works for gift cards? The T&Cs say no but the Amex offers also say the same but it works.
My Cashback available for eligible Citi Mastercard credit card & spot, BNPL account holders