Adding WhatsApp button on Instagram
You have the option to integrate WhatsApp with your Instagram Business account, providing your customers with an extra channel for communicating with your business. By linking your Instagram and WhatsApp accounts, your WhatsApp number will be displayed as a contact choice on your Instagram business or creator profile. When a customer selects this contact option, they can easily send you a message via WhatsApp.
To link your Instagram and WhatsApp:
Go to your profile and tap Edit Profile.
Under Public Business Information, tap Contact Options.
Select WhatsApp Business Phone Number.
Select the WhatsApp number you want to connect to or add a new number. You can also create a new WhatsApp account at this step.
Tap Send Confirmation Code. You’ll then be prompted to verify your WhatsApp account.
Once you’ve confirmed your WhatsApp number, WhatsApp will be added to your contact options. Your WhatsApp number should display as a contact option on your Instagram profile