Install on ShopifyBundles: one dropdown per option, not one per variant
With Let Customers Pick Each Variant turned on, a product with more than one option (color and size, for example) now shows a separate dropdown for each, instead of one long list of combined variant names. Combinations you don't stock are marked as the shopper picks, and picking your way into one blocks Add to cart with a clear message.
If you use the Let Customers Pick Each Variant setting, each unit in the bundle gets its own dropdown so shoppers can choose a variant per item, not just a quantity. Until now, that dropdown listed every variant by its full name, so a product with color and size options showed a single list like "Black / S", "Black / M", "White / XXL", and so on. The more options a product had, the longer and harder to scan that list got.
Each unit now shows one dropdown per option instead: a Color dropdown and a Size dropdown, side by side. Shoppers pick color, then size, the way they would on your product page.
As they pick, any value that would lead to a combination you don't stock is marked, so it's clear before they commit to it. If a shopper does land on a combination that isn't available, Add to cart is blocked and a message tells them so, rather than adding the wrong thing silently.
Nothing to set up. Existing bundles with the setting already on pick this up automatically. Products with only one option are unchanged, and bundles that don't use the per-unit picker aren't affected at all.