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

No freedom is absolute.

Perjury

Freedom of speech does not apply to:

Make-A-Wish helps Tacoma cancer patient fulfill dream of giving back to fellow children - KOMO

And much, much more.

Revenge porn

Revealing classified information

If you were president, how would you make America "great again?"

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.

Fraud

False advertising

How would you advertise if you wanted to be a "tour guide" who can take you through the dark web while warning you what not to look at and not to click on?

Conspiracy

Terroristic threats

Insurrection

Miley Cyrus Reveals What Caused Her Estrangement from Dad Billy Ray for the First Time - instyle.com

Child pornography

Threats of violence

Insider trading

Why can't my adopted sister accept she is not part of my family because she isn't related? Why can't she stop calling my parents mum and dad?

Trade secrets

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.

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.

Ultra-thin lenses halve incident wavelength to make infrared light visible - Phys.org

HIPAA violations

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.