Hello,

It looks like you succeeded importing Elementor demo data

One way to verify is to look if you imported all portfolio items and then if they are editable with Elementor by default (since they were created with Elementor) and the content is built with individual sections.

now coming back to the pages you mentioned:

The portfolio page templates will not display the content entered in the editor. They just build the layout automatically based on portfolio items options (hero image, hero title, subtitle, background etc) and the options of the page having this template. These options are not configurable through the editor but in wordpress admin.

So you edit these page templates indirectly by adding/modifying the portfolio items in wp admin -> portfolio

Let us know if you have any other questions.