CMS filtering help

Hi,

Basically, I’m trying to create a category section that I have linked with the products that have I have uploaded to my CMS. However, some of the products come under the same category (Please see attached) is there a way I can filter out the duplicates at this phase? I will have many more categories in the future but they won’t always be in stock so to avoid that I wanted to just have categories up for what I have in stock.

Any help would be massively appreciated.


Here is my public share link: LINK
(how to access public share link)