Clothing items do not show thumbnails despite passing moderation

The clothing items on a particular group of mine that I recently uploaded are showing as unapproved / are not showing any 2d thumbnails at all, despite having passed moderation.

Clothing displaying as unapproved despite being approved:
image

The 3D view works fine, meaning it has passed moderation:

Link to my group store containing the items:

The assets in question:

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