Hey @studiocarly,
Thanks for that clarification as the situation makes a lot more sense now!
The quote you pulled from the How to Insert a Product Block Help Center article would be correct! This is because this “variant” product is not its own standalone item within your catalog but rather an alternative to one product. In which case, it would not be possible to have this variant image be pulled as Klaviyo will only be synced with the product’s primary image; not the variant’s.
This is further supported by what you are displaying within your catalog that as opposed to a variety of different “Federico dress” appearing in your catalog, there is only one. To alleviate this, I would suggest manually building and mimicking the product block using image blocks and text blocks to be used within your email.
Alternatively, you can also add the “Federico dress” variant you want to display as its own product within your backend catalog. Doing so would allow you to pull in this new standalone product which was technically a variant to be used within your email.
David