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

Insurrection

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And much, much more.

Child pornography

Trade secrets

Disney and Universal team up to sue AI photo generator Midjourney, claiming copyright infringement - CNN

Terroristic threats

Insider trading

Threats of violence

Scientists Uncover Giant Spiders That Once Terrorized Jurassic Earth - The Daily Galaxy

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.

Freedom of speech does not apply to:

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.

Replace Your Gmail Password Now, Google Tells 2 Billion Users - Forbes

Revenge porn

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.

McDonald’s bringing it’s own version of iconic dessert to its McFlurry menu - MLive.com

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.

HIPAA violations

False advertising

Key Fed Inflation Rate Overshoots As Trump Eyes New Chair; S&P 500 Rises - Investor's Business Daily

Perjury

Fraud