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.

And much, much more.

Trade secrets

I am fed up with scammers and need a genuine call center project. What should I do? What are the things to be done for starting a BPO business?

Child pornography

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.

Perjury

Power Rankings: Rocket Classic - PGA Tour

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.

Revenge porn

Why do men love boobs (irrespective of big or small)?

HIPAA violations

Insurrection

Conspiracy

Traders bet on interest rate cuts from Jay Powell’s successor at the Fed - Financial Times

Revealing classified information

Terroristic threats

No freedom is absolute.

Major US retailers cancel Nintendo Switch 2 pre-orders - GamesIndustry.biz

Freedom of speech does not apply to:

Threats of violence

Insider trading

Scientists Just Connected These Foods with an 80% Lower Risk of Cognitive Decline - EatingWell

Fraud

False advertising