If you’re updating a product design with multiple color variations on Printful, not all the mockups in your storefront may get updated. You’ll need to add the missing product mockups manually on Squarespace.
This is because Printful only assigns one mockup to each color variation when you push a product. The rest of the product images you’ve added originally are shown in your storefront but aren’t assigned to variants. That’s why, when updating your product design, the change will only be shown on the mockups that were assigned to your product variants.
For example, if you push a t-shirt to your store that’s available in black and white and you upload two mockups for each color, Printful will only mark one mockup per color as related to your product. That’s why if you update the design on that product, only the mockups that were assigned will get updated.
To update your mockups, go to your product listing on Squarespace and manually add the missing ones there.