Shipping Additional Days for WooCommerce allows you to set additional days to your estimated delivery date into Products and Shipping Classes.
With WCSAD you can sell “on demand” products:
For all plugin we’ll use the max value: additional days of all shipping classes and/or additional days of all products.
We will show the additional day as estimated delivery time. If no additional day is used, we’ll show a message informing the product will be available after payment.
WooCommerce Correios has it’s own additional days and estimated delivery time implementation. We’ll add the max value to its delivery time: our additional days or its own implementation.
Tested up to WooCommerce version 4.8