My Apple Cash expired didn’t know it expires

If someone sends a payment using Apple Cash and the recipient does not accept it, the sender can cancel the payment, and the money is refunded to the sender. The amount of time for the money to be refunded to the sender will depend on the sender's bank or card issuer.

Note that a recipient who has not previously used Apple Cash has 7 days to accept the payment, or the transaction is automatically cancelled. The money is refunded to the sender.

Send and receive money with Apple Cash - Apple Support

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Send and receive money with Apple Cash -> Send, receive, and request money with Apple Pay - Apple Support

Terms and conditions -> https://applepaycash.greendot.com/termsconditions/