Sometimes, you will find faceted filter is available only in one category and in other categories won’t be visible.
If this happens take a look at the filter configuration and try to disable and enable the categories, it’s a bug you can find in older versions of Prestashop.
If this doesn’t solve your issue try the followings steps:
1. Go to your faceted search module
2. Configure the module
3. Then go to the Edit Section: click on “categories used for this template” section, and take a look at all the subcategories where you want to display the filters.
4. Check the field: Filters → Sub-categories Filters → Yes
5. This should then be working on your Front End.
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