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

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.

Freedom of speech does not apply to:

Panama Canal boss warns MSC ports deal threatens principle of neutrality - ft.com

Perjury

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.

Fraud

What exactly is the difference between a surge protector and a fuse? Can a fuse protect the electronic devices from lightning instead of surge protector?

HIPAA violations

False advertising

Trade secrets

Why do I want to suck cock, after smoking methamphetamine?

Terroristic threats

Child pornography

Insider trading

Dollar General Sees Greater-Than-Expected Growth as Higher-Income Consumers Seek Value - PYMNTS.com

Conspiracy

Revealing classified information

Revenge porn

Wall Street warns Trump aides the GOP tax bill could jolt bond markets - The Washington Post

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.

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.

Insurrection

Why are 38% of IIT graduates unplaced in 2024?

Threats of violence

No freedom is absolute.