Teflon, PFAS and other names for the same family of chemicals are in and on so many products these days. ALmost everything with a heating element has some coating as a corrosion protectant, but un-expected things like microwave popcorn bags, some "Scotchguard" fabrics and now even scissors (!) have non-stick coatings. In manufacturing there is a big push to get away from these chemicals, because they are 'forever' compounds, meaning they never breakdown into simpler chemicals. It is estimated that these chemicals are now in just about every living organism on Earth now. Getting back to your heater, I would trust it as far as I can throw it (onto the nearest trash heap). If you need a heater, the oil=filled type like a DeLonghi, is safe, as the heating element is 100% sealed. And they work well too.
Note if you have a self cleaning oven, using that cycle raises the temp high enough to vulcanize any foods etc in the oven. Unfortunately it also is high enough to burn off any production fluids that may be left from manufacturing and those fumes are deadly to birds.
