Files from dynamic zone not showing up in API

System Information
  • Strapi Version: 4.1.8
  • Operating System: Mac OS 12.2.1
  • Database: Dev environment
  • Node Version: 16.13.1
  • NPM Version: 8.1.2

Hello,
I have this problem, when I request my API with this route:

http://localhost:1337/api/headers?populate=*

What it returns

               {
                  "id":4,
                  "__component":"content.content",
                  "title":"Dokumenty",
                  "content":"xyz"
               }

it shows me everything but not the files and pictures in the dynamic zones.

Could please anybody help?
Thank you.