Go to Ecommerce -> Select Your Store -> Appearance Settings ( from right-sided menus) menu.
Scroll down at the bottom, you’ll find an option for enabling the WhatsApp Send Order Button. Enable it and fill-up the form in the WhatsApp Phone number field and if you want to redesign your Order text message, you can edit the order text but please keep the variable same as in the default message.
After completing set up for WhatsApp, hit save button. Now your shop customer will see a button after checkout to send order in whatsapp.
By Clicking on the button and system it will redirect the client to the WhatsApp and clicking on the send button the order information will be sent to the Store owner number.