You can now turn on "Show variants in a single list" under Edit/Remove products in your customer portal preferences. Instead of separate option dropdowns, subscribers see one combined list that only includes variant combinations you've actually created in Shopify.

This removes the guesswork from variant selection. Subscribers no longer pick a size and flavour pairing that doesn't exist, only to be blocked at confirmation. The preference applies everywhere variants appear in the portal, including swap, upsell, and edit product.

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