How to: Shopify POS UI Extension Post Purchase development

[stefanb1234]

I am trying to develop a Shopify POS UI App and I followed the documentation:

• https://shopify.dev/docs/api/pos-ui-extensions/2024-04/versions#202404

• https://shopify.dev/docs/api/pos-ui-extensions/2024-04/targets/post-purchase/pos-purchase-post-action-render

• https://shopify.dev/docs/api/pos-ui-extensions/2024-04/targets/post-purchase/pos-purchase-post-action-menu-item-render

How can I develop such tile when it is impossible to process Orders via the POS App on Development Stores? I try to go through the checkout flow, but each time the POS is declined. The BOGUS Payment Gateway is not applied to the POS for some reason, and I have no way of creating (test)orders on my development store from the POS.

Thus, it is really hard to work on such UI extension.

How can I approach this?