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.

False advertising

HIPAA violations

Why am I dreaming of people I've never seen before?

Conspiracy

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.

Trade secrets

Do countries with free health care generally have co-pays or deductibles to discourage use?

Revealing classified information

No freedom is absolute.

Revenge porn

What are some ways to drive women crazy while many men don't know?

Fraud

And much, much more.

Child pornography

What's an uncomfortable truth you've learned to accept?

Freedom of speech does not apply to:

Threats of violence

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.

LeBron James’ message for Caitlin Clark after dominant return from injury - New York Post

Terroristic threats

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.

Insurrection

China Blasts Laser 80,000 Miles to the Moon in Broad Daylight – A First in Space History! - Indian Defence Review

Perjury

Insider trading