From Where you would set the order received page?

Follow the screenshot to understand how to work delivery ability checker by zip location. For Single Branch: Settings Options:

To work time and date properly with your time you need to settings restrofood plugin timezone from restrofood settings and WP admin settings -> general Restrofood settings option: WP admin settings option:

To create product attributes follow the screenshot: Set Product Variations:

Restrofood provides a flash sale slider Elementor widget to show on sale products. Follow the screenshots to set the settings.

RestroFood WooCommerce quick order branch management system depends on WooCommerce plugin. So you have must be installed WooCommerce Plugin before use RestroFood plugin.