Customers have a separate wallet for cashback rewards. The amount in their cashback wallet is visible on the dashboard when they scroll down to the Rewards subsection.

To withdraw/cashout that money,

Tap the cashback wallet button (showing the amount) or tap the Rewards button on the bottom navigation bar and go to the Rewards hub. From there, they can tap on the cash out (for personal banking) or withdraw (for business banking) button to transfer that money into their main wallet. They can choose to transfer either the full amount or a partial amount they enter.