I was reading a lot of unnecesary stuff.
I am using React 17.
And my probrem was that the page just add new components but the browser was not refreshing the page.
If your terminal is Compiling... and then you don’t see changes on the browser, you should try adding a .env file in the root path of the project and add FAST_REFRESH=false.
Hot refresh was replaced for Fast refresh by default.