Extract measure alias assigned in a visual

Is there an external tool for Power BI which allows automatically to extract column or measure alias name which as been assigned in a visual. Is it stored anywhere in DMV?

I don't think it is in the DMV but you can see it easily enough. If you change your .pbix to a .zip and open the archive and then extract Layout, you can open up the layout json. In there, under visual containers, config, there is an attribute for display name and the measure that is used to drive it.