Hello,

I have explained the working of the variations when you use two variations and add image then the variation is dependent on one another to display the image.

You need to use the color variations combined with the all sizes then make the images set.

I have added multiple variations to the test product that I have created before just as an example for you and set the color available for all the sizes and the swatches are working fine.

You can edit the product according to your needs.

Best Regards.