As we all know Shopify has the best checkout layout with the best conversion rate thanks to :
1) lean layout with header and footer removed, with only the logo on top, avoiding any distraction
2) 2 colomns layout, only one CTA
3) Asking email first, so that if checkout is abandoned, you can contact the buyer with marketing automation (brevo, klaviyo…)
In general, our Checkout functionality comes from WooCommerce, so you can either use some plugins from WooCommerce or try to customize it using our Layouts: https://xtemos.com/docs-topic/checkout-page-builder/