The anti-AI crowd on Steam only really seems to care about it being used for art, from what I've seen in reviews.
That's useful context, thanks. I might be in a grey area on that front. Vestiges has no genAI-created images, textures, etc. Pretty much all of the (non-text) visuals are generated at runtime using Godot's 2D vector drawing capabilities.
(I've considered trying to find an artist to work with to have professional 2D art.)
I'd also include the UI in things they seem to care about. If it looks "web style" or has the common tells (dashes, //) it will be most likely be called out.