I tried to list all the traits I could think of:

- Orange/beige-ish colors - Rounded corners - Cards with a thin border - A thicker colored border on the left of cards - Serif font for headings - Monospace fonts for small text - Headings that often have an unnecessary subheading / pre-heading - Little badges, often with a "status indicator" dot on the left - Obviously LLM-generated text / language

I'm sure I'm missing many but the above are dead giveaways!