It's already there, in the European Convention on Human Rights [1], Article 8:

ARTICLE 8

Right to respect for private and family life

1. Everyone has the right to respect for his private and family life, his home and his correspondence.

You have the right to privacy, just no actual privacy. Just like in Life of Brian, where Stan/Loretta has the right to have children, but can't actually have children.

1: https://www.echr.coe.int/documents/d/echr/Convention_ENG

I feel like that would end with the same surveillance loopholes that Google, Microsoft and Apple exploit today.

Users need the ability to choose operating systems and software that is not exclusively green-lit by a first-party vendor. It's not glamorous, but pretending that software isn't a competitive market is what put us into this surveillance monopoly in the first place. "trust" distributed among a handful of businesses isn't going to cut it in a post-2030s threat environment.