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

Fraud

No freedom is absolute.

Threats of violence

In what ways Indian parents are destroying their children's life?

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.

Revealing classified information

Switch 2 Tears Of The Kingdom Confirms Link Respects Women - Kotaku

HIPAA violations

Child pornography

Insurrection

Sega Throws Shade At Mario Kart While Showing Off Sonic Racing: Crossworlds - Kotaku

Terroristic threats

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.

Insider trading

Nintendo Switch 2 Divides the Community as Doubts Rise Over Whether the New Console Truly Delivers on Expectations - Rude Baguette

And much, much more.

Conspiracy

Perjury

How the Universe and Its Mirrored Version Are Different - WIRED

Freedom of speech does not apply to:

Revenge porn

False advertising

When was the first time your wife had beastiality?

Trade secrets

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.