This is Max from the Shopify Team.
It sounds like you might be interested in this tutorial - Hide sold-out variants. This will allow you to show what is available!
Usually, themes organize variants based on how they are arranged or displayed within the Shopify admin. You can rearrange the variant options manually using these steps.
If you're looking for a coding solution to make a more specific change, I'd suggest sharing the theme you're working in and even some images to show the desired outcome of your product page!