These sites earn through Coupang Partners links on parenting articles. If the first thing a reader sees is an ad notice, the whole article reads like an ad. So the first and boldest thing in a post head is what sources the article is based on and when they were checked.
All four packs keep the same order inside the post head (PostHeader): title and one-line summary, then the trust line (n agency sources, verification date), then the disclosure. The trust line is drawn bolder than the disclosure, and the disclosure is a quiet one-line outline instead of a colored box. The check scripts have no item that measures this order; the component itself fixes it. The basis of the trust line is checked, though: seo:audit reports an error when a post has 0 sources and a warning when it has fewer than 2.
The disclosure is not hidden. The wording and its 14px size stay. In a post that really contains Coupang links it appears twice: in the head and right above the product block.
When to use
Think of it when reordering the post head, or when you want the notice to stand out more (or less). First check that the trust line is still above it.