Probably some of it is made using Illustrator's annoying built-in generative AI, hard to know. Either way it should ALL be labeled and there's a lot of content here that isn't. Thanks for your help in getting mislabled items out of my search results.
Perhaps @Contributor1 can have a look, but rollovers of their assets show many of the assets as AI. Perhaps the examples you noted were oversites by both the contributor and the moderator.