https://www.cnet.com/news/apple-pay-cash-drops-person-to-person-credit-card-payments-says-report/

On Monday, Apple stopped allowing users to send person-to-person payments using a credit card, according an Apple Insider report on Tuesday. The updated terms of service for Apple Pay Cash, which is provided by Green Dot Bank, now say: "Credit cards are not Supported Payment Cards and therefore cannot be used to fund a P2P Transfer or to add funds to your Apple Pay Cash Card."

The changes are coming with iOS 12.2 and watchOS 5.2 updates, and Apple says it'll help users avoid cash advance fees that banks may charge when paying someone with Apple Pay Cash, according to Apple Insider.