I’m having trouble using my card on Amazon, Wayfair, etc; even though it’s loaded in my wallet.

Every time I try to use my card outside of an official page it won’t load. Example, using outside of the home at stores, online at non-apple sites. Says my card won’t load or is unacceptable. My card is loaded in my wallet, and if issues accessing my wallet app, I have my cc number exp date code entered manually. Still no luck.

Can I only use my card on an apple site???