Well, the first metafield is associated with the category. I didn’t add it. So, when I try to associate the second variant to a metafield I get the message that no metafields are available.

A merchant is trying to add a second color metafield to display secondary color variants uniformly on product pages. Currently, only the primary color uses a category-level metafield that displays properly, while secondary colors appear as plain text.
Key Challenge:
Proposed Solutions:
Current Status:
No native Shopify solution exists. Implementation would require:
One contributor offered paid assistance for setup and documentation. Two other users later confirmed they face the same limitation with no available solution.