Size filter for on stock variants

Hello, I need to put a filter by size in the product grid.

The idea is that the user can filter the products available for the selected size.

The filter is showing the products that have that size, regardless of whether they have stock or not.

If you look at women’s footwear and filter size 39 you will see, for example, the tucana clog, which does not have stock in size 39.

Could you help us determine what the error is?

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