Hello,

The “Extra description” option doesn’t add an additional tab to the product page, if you want to add the product tab to the specific category products, you should use theme presets. Please navigate to Theme Settings -> Settings presets -> create a presets with the condition as in the below screenshot:

https://prnt.sc/nPrtNh_PQZJO

After that, edit theme settings and navigate to Single product -> Tabs -> and create a custom tab.

https://prnt.sc/TzJjOmv0quiY

Here is documentation about theme presets:

https://xtemos.com/docs-topic/theme-settings-presets/

Kind Regards