Hey, Have you misunderstood?. As it was like this before and I have had this done on my previous theme also.
So when it was the old method (variant buttons) You could click one style and only the buttons for the available styles would show and hide any unavailable size variants of that style.
When you changed over to the dropdown method for me and it is now showing all sizes including unavailable sizes. i.e. ladies tank top does not come above 2xl.
see https://www.thewildlifestyle.com/products/for-fox-sake-stop-hunting?variant=26215652359
Hope thats doable as showing unavailable sizes is very messy and i’ve had that removed on every other theme Ive used pretty easily.
Thanks!