Size without stock filtered

Hello, I have the following problem, when I use the filter to filter by sizes, it shows me products that, although they have the size within the options, sometimes it filters me products that have that size but do not have stock of that

I need it not to show me when filtering the products with variations without stock

But I need that when entering the page it shows me all the products regardless of whether there is stock or not, the boss requests that and only when the filter is used that the products that do not have stock of the requested variation are hidden

How could I achieve this?