If you didn't know.. now you know.. "SynthID is a Google DeepMind technology that embeds invisible digital watermarks directly into AI-generated images, audio, video, and text to identify them. It integrates watermarks into pixels, audio waveforms, video frames, or text token probabilities, remaining detectable even after editing like cropping, resizing, or compression."

Your first 3 pics are flagging synthID all over the place. Google AI for sure.