If freedom of speech is absolute, how come it's not applied for private spaces and for the Internet?

Revenge porn

Perjury

HIPAA violations

How did you as a human being change while growing up?

Freedom of speech does not apply to:

Trade secrets

Terroristic threats

How scientists confirmed the existence of 200-million-year-old species thought to be extinct - ABC News

Threats of violence

Fraud

Conspiracy

Northern Irish rap group Kneecap plays Glastonbury despite controversy - NPR

No freedom is absolute.

You have freedom to travel. If I loan you my car, I can tell you not to take it out of town, because it’s mine, you have no right to use it, and if I give you permission to use it I can tell you what you can and can’t do with it.

Insurrection

Splitgate 2 Dev Says He's Tired Of Playing Call Of Duty And Wants Titanfall 3 While Wearing A 'Make FPS Great Again' Hat - Kotaku

That’s what it is. You have no right to use other people’s stuff. If people let you use their stuff, they can tell you how you can use it, and they can tell you to stop using it any time they want.

Insider trading

False advertising

Will surging sea levels kill the Great Barrier Reef? Ancient coral fossils may hold the answer - The Conversation

Child pornography

You have freedom of speech. If I loan you my computer, I can tell you not to use it for certain things, because it’s mine, you have no right to use it, and if I give you permission to use it I can tell you what you can and can’t do with it.

And much, much more.

The tiny Logitech Keys-To-Go 2 keyboard lets me get work done almost anywhere - CNN

Revealing classified information

If you’re wondering why free speech doesn’t apply to the internet, it’s because you have no right to use other people’s stuff for free.