Missing required item specifics

eBay blocked the listing because required item specifics (Brand, Model, Size, etc.) for the chosen category are missing. eBay's category-specific specifics are mandatory and growing.

Each eBay category has its own required specifics. Cross-channel feeds rarely populate them all by default.

1. Pull the eBay category specifics requirements via the Trading API or Seller Hub Insights.
2. Map each required specific to the corresponding feed attribute. Common ones: Brand, MPN, Size, Color, Model.
3. If the specific genuinely doesn't apply, use 'Does Not Apply' rather than blank.
4. Resubmit through the Listings API or feed.

• Leaving non-applicable specifics blank — eBay requires explicit 'Does Not Apply'