If freedom of speech is absolute, how come it's not applied...

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.

Insurrection

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.

Study finds creature that may hold the key to bring limb regeneration to humans - WKRC

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.

Insider trading

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.

Why do British people always write "xxx" after their names?

Revealing classified information

Freedom of speech does not apply to:

Terroristic threats

Taking a realistic look at terraforming Mars - Phys.org

Child pornography

Threats of violence

And much, much more.

iOS 26 Could Bring Sleep Detection, Camera Controls, and New Gestures to AirPods - MacRumors

No freedom is absolute.