Shopify's dynamic "Buy Now" button only supports a single variant or product at a time. To prevent potential user errors, we toggle the visibility of this button when a bundle deal includes any of the following:
Different variants selected
Free Gift
Upsell Product
Workarounds
Currently, no workarounds exist for these limitations. The lack of support for multiple variants or different products within Shopify’s "Buy Now" button functionality is a constraint of the platform beyond our control.