How to add multiple sites to Git Pages?

Question

GitHub

In general, I created a repository like nick.github.io
I have a website there.
The site is easy to open in the browser.
Now there is a need for another repository of the same kind.
I went and created it. Let it be for example repository_name
I heard that you can create a gh-pages branch and the site will work the same as nick.github.io , only it will be nick.github.io/repository_name , but it doesn't work
What I don't So? Help me please!

Answer 1

everything works, just need to wait a bit)