PTFE is perfectly safe as long as you don’t get it too hot. So, not the best material for non-stick pans.
The thread tape on all non-compression screw-type plumbing fittings is made of PTFE, and so is Gore-Tex.
I’m well aware of the danger of PFAS, my local watershed is contaminated with it from a 3M plant.
You can use pipe dope instead of PTFE if you want. It's just more expensive.
Most pipe dope is made with PTFE now.