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.

Insider trading

Freedom of speech does not apply to:

Is it common for girlfriends to have close male friends who are single and not related to them?

Revealing classified information

And much, much more.

Child pornography

Is a narcissist capable of understanding the damage and the hurt that they have caused in your relationship?

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.

Revenge porn

JPMorgan's Jamie Dimon Says U.S. Should Stockpile Missiles, Not Bitcoin - CoinDesk

Fraud

False advertising

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.

Do leftists understand why young men are becoming more right-wing?

Conspiracy

Insurrection

Perjury

Why is social media so anti-fee speech, and have they become total BS?

HIPAA violations

Trade secrets

Threats of violence

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Terroristic threats

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.