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

No freedom is absolute.

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.

Threats of violence

How did you know you weren't the narc?

Terroristic threats

Insurrection

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.

An Invisible Force Has Been Eating Away at Mars for Centuries… and NASA Finally Caught It - The Daily Galaxy

Trade secrets

And much, much more.

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.

How can I fall asleep fast at night?

Fraud

Conspiracy

Insider trading

What are some reasons why men may not want to date a woman who can pay her own bills?

Freedom of speech does not apply to:

HIPAA violations

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.

1st measles case of the year in South Dakota as CDC updates travel guidance - ABC News

False advertising

Perjury

Child pornography

Carlos Alcaraz praised for showing 'insane sportsmanship' during his French Open match against Ben Shelton - The Tennis Gazette

Revenge porn

Revealing classified information