You can’t. The funds are moving through the ACH transfer system and trying to redirect the funds or reverse the transfer will take longer than letting the transfer proceed as you scheduled it.
Apple Cash is serviced and issued by Green Dot Bank. Please contact an Apple Cash Specialist at Green Dot Bank.
Contact Green Dot Bank:
by calling (877) 233-8552,
by mail for disputes at P.O. Box 9, West Chester, Ohio,
by mail for general customer service at P.O. Box 1070, West Chester, Ohio 45071,
visit www.greendot.com
https://applecash.greendot.com/termsconditions/