In Product overview > Click Shipping Time
From your Shopify admin, go to Settings -> Custom data
Click Products → Add Definition.
Please enter correct Namespace and Key as we noted below.
From your Shopify admin, go to Products -> All products.
Find and choose the product that you want to edit.
In the Metafields, please insert content for "Shipping time" field.
Or you can access link 'Enter shipping time for each product here (days).' => You can enter day for each product
