In-app purchases and Apple Pay problem
When I make in-app purchases it all goes on my mom's debit card, even if I don't have and never had her card in my Apple Pay. When I using apple cash or just buying apps from apple store, it takes money from my Apple Pay primary card. From the picture below you can see, that's in-app purchase, and when I choose something to pay, it doesn't use my debit card, and doesn't give me an option to use my Apple Cash card, or my debit card.
iPhone XS, iOS 13