Shop pay and other dynamic checkout buttons not showing on checkout

[prizedlife]

I am using an app that is incompatible with AJAX cart (Popup, Slider, Drawer)cart & Dynamic checkout Buttons (GPay, Paypal, BUY NOW) buttons. So the app developers have Disabled them to avoid any Issue in the Future - on the PRODUCT PAGE ONLY.

They have said that our customers can always use these payment methods on the checkout page.

But no shop pay or dynamic checkout button is showing on checkout page. Although when I input my email address that is registered with shop pay it asks for my code to send to mobile.

How can I show these buttons just on the checkout page? So the customer knows that payment feature is available?

Thank you for your help!