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

No freedom is absolute.

Revealing classified information

Freedom of speech does not apply to:

Why did my 2001 4.6 liter Mustang GT V8 make "only" 260 HP while today's base Dodge 3.6 liter V6 churns out almost 300 HP? Both benefit from fuel injection and ECUs.

Fraud

Insider trading

Perjury

When an Air India flight crashed into a medical campus, surviving doctors rushed to save lives - Politico

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.

False advertising

Revenge porn

What pleasure do guys get by sucking female breasts?

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

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.

Which is the correct Tamil New Year, Thai-1 or Chithirai-1?

Trade secrets

Threats of violence

Terroristic threats

Why does Africa have all mineral resources but she is suffering economically?

Insurrection

Child pornography

HIPAA violations

Why are North Carolina Democrats against Mark Robinson? He is the modern Martin Luther King Jr. and the Democrats are being stupid for not voting him.

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.