On illuminarty.ai i find this tool that detect AI generated images, synthetic, tampered images and Deepfake. There's a Free version and some subscription plan. After a couple of test it actually showed somewhat accurated results:
.> 70% Chance on actual AI drawing tested
<20% On (human) edited images
<5% On original handmade drawings
EDIT - Not so great with realistic AI Photo. Somehow works better with AI art.
UPDATE - I find this one who works better on photo | Is It AI
vvvv Share your % results and pics to see more test vvv
It's useful one one thing: adversarial training of generative AIs.
Except for photorealistic AI, which already beat this detector.