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

Fraud

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

MLBits: LSU Wins College World Series, Cal Raleigh Continues to Crush, A’s Break Ground, More - Bleacher Nation

Revealing classified information

Freedom of speech does not apply to:

Child pornography

Google AI Mode traffic data added to Search Console reporting - Search Engine Land

Revenge porn

Perjury

HIPAA violations

How scientists discovered 200-million-year-old species thought to be extinct - MSN

False advertising

Insurrection

Conspiracy

Archaeologists Uncover Europe’s Oldest Megalithic Complex in France - Indian Defence Review

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.

No freedom is absolute.

Trade secrets

Boston University releases statement on Alex Cooper’s allegations - NewsNation

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

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.

How did China develop DeepSeek with less than 50 million USD when Trump is saying we need billions?

Threats of violence

And much, much more.