Flavors of Spain

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

The code, mechanics, and gameplay of 'Sabor de España' do not use generative Artificial Intelligence. However, some promotional graphic elements displayed exclusively on the Steam store page (such as store headers, promotional banners, and base logo designs) have been created or refined with the assistance of AI image generation tools.

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.