The product_type taxonomy attribute is empty. TikTok needs it to classify items for delivery and recommendation. Listings show as low quality until added.
TikTok Shop / TikTok Catalog Manager's product schema has format and value rules per attribute. This issue is typically: missing a required attribute for the category, an invalid enum value (e.g., 'XL' submitted where 'M, L, XL' is the valid set), out-of-range numbers, or attributes that conflict across the feed.