I believe the solid black ones are, but I've seen some fancy styles that are colored and coated, and I'm not sure what that stuff is made of, so you'd have to check.
I'm not trying to be contradictory, but an owner shared their experience with me about their bird who passed away because of cooking with a Teflon pan. The owner was making french toast on medium heat. The parrot was in another room. The pan likely overheated on the edges where there was no food. Even on lower temperatures heat can build up.
It is perhaps unlikely, but any chance is too much for me. Which is why I would not risk it.
https://vcahospitals.com/know-your-pet/teflon-polytetrafluoroethylene-poisoning-in-birds
"In the case of a non-stick surface becoming over-heated and therefore releasing its toxins, a common scenario involves a non-stick pan left on the stovetop. The person gets distracted, the pan over heats or burns, and toxic gases are released into the air.
This can even happen at lower temperatures.
Why are birds in danger of “Teflon poisoning”?
Birds have unique, highly efficient respiratory systems and are therefore very sensitive to inhaled toxins or poisons, such as PTFE.
Your bird doesn’t even need to be NEAR the offending appliance or item for poisoning to happen."