What is WhatsApp Flow
WhatsApp Flow is an interactive form or mini-journey within WhatsApp that helps users complete tasks like filling out details, selecting options, or making bookings — without leaving the chat.
Example: A user clicks “Order Now” on a WhatsApp message, selects items, adds an address, and confirms — all within a guided flow inside WhatsApp.

How you can send through MSG91’s WhatsApp:
You have to create the WhatsApp Flow in your Meta Business Manager:
Login to https://business.facebook.com/
Business Settings > WhatsApp Accounts
Select the WABA in which your WhatsApp number is added in MSG91
Click on the WhatsApp Manager
Manage Template > Create Template > Select Flow in Marketing.

Fill out the details and Submit for Review.
Once the template is approved, Just go to MSG91 panel> WhatsApp >
Templates > Click on the Sync Template at the right corner.
Now the template is connected with MSG91.
Send the WhatsApp Flow templates (API only):
To know how to send a Flow via API use this link: https://docs.msg91.com/whatsapp/template-bulk
Just pass the Whatsapp flow name under the template paramter, in the same way you pass the name of any Whatsapp template:
"template": {
"name": "template-name",
"language": {
"code": "language-code",
"policy": "deterministic"
}
Sample:
"template": {
"name": "surveyflow",
"language": {
"code": "en",
"policy": "deterministic"
}
API Doc: https://docs.msg91.com/whatsapp/template-bulk