PTFE is not the only way to get "nonstick" cookware.

The amount of stickiness perceived is 99% a skill / procedural issue.

https://www.youtube.com/shorts/OFaFgg4P6QI

Indeed I don't see much talk about non-PTFE non-stick: I have a set of enamel pans which work for me just fine, and for the eggs a granite pan (which I have no idea how's actually made). I must say that as nice the cast iron might be when cooking, I didn't like the cleaning part so I ditched them (also the "seasoning" sounded yuck), and for the love of me I couldn't get the stainless steel to not awfully stick.