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

Freedom of speech does not apply to:

False advertising

Revealing classified information

Oracle Stock Surges for Second Straight Day After Strong Results, Rosy Outlook - Investopedia

Child pornography

Threats of violence

HIPAA violations

What measures are shipping companies taking to navigate around conflict zones like the Red Sea and Black Sea?

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.

Conspiracy

Trade secrets

Video: Digital Foundry Delivers Its Cyberpunk 2077 Tech Review On Switch 2 - Nintendo Life

No freedom is absolute.

Perjury

Revenge porn

What are the psychological reasons behind an extreme obsession with another human being?

Terroristic threats

And much, much more.

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.

What are some important works of Marcel Proust (novelist)?

Insurrection

Fraud

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.

What do you think of Andrew Tate?

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.

Insider trading