If I create a new page in the dashboard and set the url to /page-about it will take the page created in the dashboard and not the file created as page-about.hbs
I did a research and you were missing something because you said to point the page created in dashboard to the physical file and I was pointing /page-about and it was only /about + ghost restart but you were right!
Now I can add my meta and other stuff from there, thank you