Google has been spotted showing an AI disclosure label in the Sponsored Results section of mobile Search.
In the example spotted, the label appears directly below the ad description and above the ad extensions. It’s visible as soon as the ad appears.

When advertisers mark an asset as created or edited with AI, users worldwide can find the disclosure under How this ad was made in My Ad Center. They can open it from the ad’s three dot menu on Search, YouTube, and Discover.
Google also displays the label directly on the ad for campaigns targeting the European Union, India, New York, California, South Korea, or Vietnam. Read more about this in Google Ads Help.
This update was spotted by Nacho Bengoetxea.