The Slingshot block normally stays hidden while the selected variant is available. Test with a variant that shoppers cannot currently buy.

Check the product first

  1. Open the product in Shopify Admin.
  2. Confirm it is active and published to the Online Store channel.
  3. Confirm the test variant has no available inventory.
  4. Check whether Continue selling when out of stock makes the variant purchasable.
  5. Open the storefront and select that exact variant.

Check the theme block

  1. Go to Online Store → Themes → Customize.
  2. Open the product template assigned to the test product.
  3. Confirm the Slingshot app block is present and enabled.
  4. Save the theme.
  5. If you edited an unpublished theme, use its preview link rather than the live storefront.

Check custom theme behavior

Some themes replace the product form or variant selector with custom code. Try moving the Slingshot block inside the main product information section. Disable theme optimizers or script blockers temporarily for a clean test.

Still missing

Test in a private browser window. If the block works there, clear storefront cache or review a consent/script-blocking tool. Paid-plan merchants should include the theme name, product URL, selected variant, and a screenshot in a support request.