Check your exact setup. Meeting the minimum versions is a starting point. Test your theme, checkout and payment gateway on a copy of your store.
Simple and variable products are supported. Included extension profiles cover initial subscription purchases, native Product Bundles and non-upload Product Add-Ons. Validate the extension versions and cart restoration you use.
Custom checkout builders and custom Checkout Blocks fields need integration checks, including shopper permission and product details. For multiple currencies, enable the relevant currencies and validate your FOX or WCML integration.