Hello,
Look, you send us this link https://wedevs.com/docs/dokan/modules/dokan-delivery-time/ Did you read that post? Dokan required Dokan Delivery Time Module that is available for users of the Dokan Pro, it’s not available for the Dokan light version. Also, if you have questions about Dokan options contact Dokan plugin support. Our theme is compatible with the Dokan plugin but we are not plugin developers to provide support for the plugin options.
Regards