New Step Checkout

New Step Checkout contains

• Additional checkout step "Checkout Products" before the shipping step with displaying the product list widget in slider mode.
• Widget that extends Catalog module functionality and provides a template that contains a product list created using rule based filter.

To use the widget:

• Create a CMS Block with Identifier "checkout_products_block"

• Insert Product List widget with template option "Checkout Products Grid Template"

Referances

https://devdocs.magento.com/guides/v2.4/howdoi/checkout/checkout_new_step.html