I havent heard of the right to be heard, but most people know of free speech.
So where are you getting the idea of the right to be heard ?
Is it a legal idea, your personal idea, a philosophical idea ?
Are you trying to derail, or are you seriously not understanding that there is no right to be heard, it's a thing GP made up on the spot to illustrate what free speech is not?
That's because there's no "right to be heard." Just because we have a right to speak freely doesn't mean we have a right to be listened to. You might be free to say whatever you like, but everyone else is free to ignore you; owners of publishing platforms are free to not publish your recorded words.
As I said, freedom of speech does not automatically transfer into a right to be heard.