Parent Category

im using Divi builder, trying to get my page as the parent category not a sub category.. cant figure it out

here is another website that has a page that is a parent category ( https://www.wereviveu.com/injectables/ ) … but when i try to do this i get a sub category example
( https://www.wereviveu.com/injectables/injectables

Can anyone advise me

Roland

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