I see documentation of a new feature in Twilio (send location). I followed the documentation as a test, but it does not show up in Whatsapp.
context.getTwilioClient().messages.create({
from: 'whatsapp:' + context.WHATSAPP_NUMBER,
body: "Office Location",
persistentAction: ['geo:37.787890,-122.391664'],
to: event.From
}).then(message => {
callback(null);
}).catch(err => callback(err));
The body 'Office Location' shows up in Whatsapp, but not the persistentAction.