@simonemontrucchio I ran into the same thing you did. The Admin’s view of TinyMCE Advanced was not the same as the Editor’s view of TinyMCE Advanced. Then I looked at the Author’s view of TinyMCE Advanced, and it was the same as the Admin’s view, which didn’t make sense to me.
Then I realized that the “Toolbar Toggle” button (the box of dots usually on the top row on the right in the standard TinyMCE) MUST be added in the TinyMCE Advanced settings by the Admin, and then the Role-user with the wrong view of the editor MUST press that button.
That will open things up for your people. ??