1 - In the “Customize” section of your store’s administration interface, click on “Payment” > “Payment methods”. All of the payment modules that are activated are displayed. Look for the “PrestaShop Checkout” module and click on “Configure”.
2 - Follow the onboarding steps for PrestaShop Checkout: PrestaShop Checkout account and PayPal account
3- When the payment methods are activated (Stripe, PayPal, etc.) and you can see them in your purchasing process in your store, go to “Payment Method” in your back-office and deactivate the other payment modules.