Product Filters for WooCommerce

Issue Description:
We are experiencing a critical error in our store’s filtering functionality. The filtering system works correctly with simple products, but it becomes ineffective or fails to return results when dealing with variable products.

Key points of the failure:

Display: Currently, our product variations are configured to be displayed individually in the catalog (as if they were independent products).

Logic Failure: When applying an attribute-based filter, the system fails to recognize these linked variations, even though the attributes are correctly assigned in the backend.

Current Result: When filtering by an attribute, the products are returned, but the attribute counts (the numbers next to the attributes) still reflect the parent product. Furthermore, options are not being cleared or hidden even when those specific variations are unavailable or don’t exist.

Request:
We need assistance to ensure that the filter’s database query (WP_Query) correctly includes product_variation and not just simple product_type. We need to maintain compatibility with our current configuration where variations are displayed individually in the shop loop.