This will probably be pushed with the next update, when you have to re-agree with the terms of service.
Re:Looking ahead for WhatsApp
by denzil_correa on Thursday August 25, 2016 @09:03AM
(#12358650)
I do not remember receiving any agreement to ToS on a new update.
> After you agree to our updated Terms of Service and Privacy Policy, you will have an additional 30 days to make this choice by going to Settings > Account > Share my account info in the app.
I can't see the option either.