Edit category

Hi everyone, I’m learning about Taxopress, to solve my 1 problem. Will it work as I want it to? Look forward to the help.

I have 3 categories, 1 parent and 2 child categories. I don’t want to use the default category look, because it’s not really aesthetic for me. I use Flatsome theme, and Flatsome doesn’t seem to support UX Builder to edit the look and feel of the category. I went to TaxoPress, because it seems to have a lot of customization for the category.

I tried by designing a separate page using UX Builder and set the URL is (“domain/category-name”) to be the same as the category URL (Only the category will have: “domain/category/category-name”)
I use TaxoPress, and prevent it from being fixed to the front.

The magic happened… when I clicked on the category, the link was removed: “category” and changed to the interface page that I designed with UXBuilder before (I would love to use this instead). But when I edit the CSS and add some elements related to the page, it goes back to the default theme page. And I still don’t know the reason…

Am I doing something wrong or missing somewhere in the “Taxonomies” setup?
Am I doing this wrong, and affect the SEO structure? (The website I’m building and no posts + traffic)
Is there any workaround that can help me?
Thank you everyone and best regards.