Because it looked like spam to the automated system, and a trusted moderator agreed with it.
He then - correctly - reported the account and the community closed that as well.
And frankly, if I'd seen it, I'd have assumed it was spam and done the same thing.
We get a lot of spam: it's caught by the automated system and referred to trusted members to decide if it is or isn't - and yours look like spam. That may not have been your intent, but we we don;t get "intent" markers, just the text you submit. And "if it walks like and duck, and it quacks like a duck - it's a duck!" applies.
Try posting questions without links to odd (and dodgy looking) sites: include relevant code fragments, and explain your question in detail instead of just posting:
Hi everyone, my question is how to create a verification device using a Raspberry Pi Pico.
On login or sign-in page, on websites, click a on button sign in with RPi device, enter code on raspberry pi pico keyboard, and website automaticaly log in on account. How to do this?
What I have tried:
I'am researched a internet and finded this [dodgy URL]. In this article not writed how to code a this project.
There is nothing there that tells us anything without following your link - and since we have no idea what is at the other end, most of us just aren't going to do that!
Start by explaining where you are at the moment, and what the next step in the process is. Then tell us what you have tried to get that next step working, and what happened when you did.
If you are having problems getting started at all, then this may help: How to Write Code to Solve a Problem, A Beginner's Guide