The pending payment status on the Cash app clearly shows you that the transaction you made has stuck in the pipeline of the network between the bank and the Cash app. Basically, whenever you send money on Cash app, you need to ensure the internet connectivity, available funds, recipient’s details, etc.
https://www.gonetech.net/process-to-send-money-from-paypal-to-cash-app/
https://www.gonetech.net/process-to-send-money-from-paypal-to-cash-app/