There is a conflict between Woodmart and the “Fluid Checkout for WooCommerce – Lite” plugin. On the Checkout page, the header and footer do not appear, even in Elementor the layout has the “Elementor full width” option.
When I deactivate the plugin, the layout appears normally again.
Could you please check how it works with some default WordPress themes like TwentyTwenty or WooCommerce Storefront to understand is it our theme issue or not? Send us a screenshot so we can see the difference.