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

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.

Terroristic threats

Trade secrets

Disney and Universal’s Lawsuit Against Midjourney, Explained - Vulture

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.

Fraud

No freedom is absolute.

Trump says U.S. will get rare earth minerals from China and tariffs on Chinese goods will total 55% under new trade framework - PBS

Revenge porn

Perjury

Freedom of speech does not apply to:

Can you explain the difference between God and atma according to the Bhagavad-Gita?

Conspiracy

Revealing classified information

HIPAA violations

Bitcoin Price Rises. This Could Be the Next Big Crypto IPO After Success of Circle Stock. - Barron's

Insurrection

False advertising

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.

Scientists identify a cellular 'switch' that could reverse type 2 diabetes - Earth.com

Threats of violence

Child pornography

Insider trading

Common Brain Parasite Infecting Up To 30 Percent Of Americans Disrupts Neuron Communication - IFLScience

And much, much more.

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.