I think for AI-generated websites, they tend to use a lot of emojis for almost everything. Also, they use colorful and bright colors. Other indication is using a single HTML file for a page, with embedded CSS and JS. In my opinion, most developers who wrotes the codes themselves most likely wouldn't heavily embed their CSS and JS into the HTML file because of readability.
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I think for AI-generated websites, they tend to use a lot of emojis for almost everything. Also, they use colorful and bright colors. Other indication is using a single HTML file for a page, with embedded CSS and JS. In my opinion, most developers who wrotes the codes themselves most likely wouldn't heavily embed their CSS and JS into the HTML file because of readability.