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

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.

Terroristic threats

Insider trading

Why do women consider 80% of men as unattractive?

Child pornography

Threats of violence

Perjury

Microbiome: First bacteria we meet can keep us out of hospital - BBC

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.

Freedom of speech does not apply to:

Trade secrets

Porsche Built A One-Off Street-Legal 963 Hypercar For 88-Year-Old Roger Penske - Jalopnik

Conspiracy

Insurrection

Revenge porn

Brian Daly Named Director of Division of Investment Management - SEC.gov

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.

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.

What is the kinkiest thing you and your sex partner have done in bed?

Revealing classified information

False advertising

Fraud

'Strawberry moon' set to dazzle as rare lunar standstill graces the night sky - KOMO

HIPAA violations

And much, much more.