Hi Daniel,
Did you go through file document and image entity learning path?
Once you go through this learning path then you can create an object of your CustomFileDocument entity in a microflow and call a page (pass NewCustomFileDocument object), in the page use file manager widget in a dataview (datasource is of type context and select CustomFileDocument entity)
Hope this helps!
i read this and its clear, but how can i make it visible in a list view?