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

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.

Threats of violence

HIPAA violations

Do airline pilots try to avoid turbulence? How can you tell if your flight has been rerouted due to weather conditions or other factors?

Revenge porn

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.

Sony’s DualSense Edge controller is receiving a rare $30 discount - The Verge

Terroristic threats

False advertising

Child pornography

What is the best way to get started using AI to make my own apps?

No freedom is absolute.

Insider trading

Conspiracy

Is modular building a fix for NY's housing crisis? State officials hope so. - Gothamist

Freedom of speech does not apply to:

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.

Trade secrets

Michaels buys Joann brand, plans to expand crafting supply to meet demand - ABC News

And much, much more.

Insurrection

Revealing classified information

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Perjury

Fraud