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Magento 2.4.3 how to show size filter to show in stock child product

We are using magento 2.4.3

We have enabled inbuilt displaying out of stock product as enabled
We want to show Product details page hence we have enabled it. But on collection page, when we apply size filter, we want to display only in stock sizes but currently all products with that size visible is coming. How to solve for this?
https://www.fancode.com/shop/category/ipl