nostr:npub1m2mv0qdf4z3l4jq89m6d9lspavr2repumgjjszpyztd5c65asklqf4ycmc Up to the respective app developers :)

Anything following the appdata guidelines would qualify, which currently almost nobody does in every respect. GNOME apps tend to be among the best ones when it comes to icons and summaries, but e.g. screenshots are also not great everywhere. There's LOTS of work to do across the ecosystem to improve appdata quality.