Hi @Liam You are correct, when I select Amazon Payment Method, the checkout ui is transform from One Page Checkout (my configuration) into Three Page Checkout Amazon Pay, and all of my App Block of my extension has gone.

Hi all,We used Checkout UI Extension to build the Point feature when user purchase on checkout page. All work fine, we could input point usage, or display text on checkout page though App Block, but when we choose the Amazon Pay method, after we logi...