Aqua Scrap: Deep Clean

The developers describe how their game uses AI generated content like this:

Generative AI was used as part of the development process to create and refine some pre-rendered 2D artwork, including icons, item and character sprites, backgrounds, UI elements, and marketing images. All AI-assisted assets were reviewed and curated by the developer before inclusion. The use of third-party assets were also used in the creation which got refined. No content is generated by AI during gameplay, and the game does not connect to any external AI services.

Required on Steam store pages since 2024. It covers content that ships in the game, on its store page or in its marketing — Valve does not require a disclosure for AI tools used during development, so this says nothing either way about how the game was made. Check it on Steam.