No category to select in Frontend Submission Form

I found some functions very convincing because they are required by law in Europe, such as the highlighting of commercial advertisements.

Categories are only available in the backend!!!

However, there are also 2 other serious problems, such as no dropdown for selecting a category in the submission form or a setting for the preferred layout display (List or Grid) when listing a category.

Almost perfect and completely unacceptable are very close together…

The page I need help with: [log in to see the link]