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.

Child pornography

Revealing classified information

Princess Peach's Voice Actor Has Been Replaced After 18 Years - Nintendo Life

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.

And much, much more.

Terroristic threats

Scientists Spot Mysterious Object in Our Galaxy Pulsing Every 44 Minutes - futurism.com

HIPAA violations

Threats of violence

Insider trading

How humpback whales are playfully communicating with humans, according to scientists - ABC News

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.

Conspiracy

Perjury

Why am I not attracted to masculine men? Why do I like more feminine attributes on a man?

False advertising

Trade secrets

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.

Resident Evil 9, Requiem, Announced At Summer Game Fest With Trailer And Release Date - GameSpot

Fraud

Revenge porn

No freedom is absolute.

What are your darkest taboo confessions?

Insurrection

Freedom of speech does not apply to: