This is definitely a feature that I can pass along to our developer team to help us improve our platform. Currently, you can go into Products > Collections and create an Automatic Collection that has a “Variant title” condition to add products to your store containing that specific variant.
This would show any products with the variant titles listed, however it will not limit the products to the specific variant, only. You can learn more about creating conditions in our help doc: Conditions for automated collections.
This app, Product Variants List Viewer can help you with showing/hiding variants for a product within a collection.
You could also create separate products for these specific variants, and create a collection with them.
Let me know if that helps and if you have any other feedback, feel free to reply to this thread!