By default, both delivery date and time slot picker is enabled on your store. If for some reason it is not enabled, follow these instructions to enable it.
1. Login to Store Pickup + Delivery from your Shopify Apps page2. Click on Settings within the Store Pickup + Delivery app
3. Click on the Local Delivery option
4. Scroll down to the Date picker block and locate the block titled Date and time slot picker:
5. To enable the delivery date picker, click on Enable delivery date picker.
6. Enable delivery time picker will appear once you enable the delivery date picker. Click to enable.
7. Click Save