Welcome to the Make community!
That’s a limitation on WhatsApp business. You’ll need to contact their support for more details.
Hope this helps! Let me know if there are any further questions or issues.
— @samliew
P.S.: Did you know, the concepts of about 70% of questions asked on this forum are already covered in the Make Academy. Investing some effort into it will save you lots of time and frustration using Make later!