You’re correct that there are no PCBs in Teflon. I was using the term for brevity, but I’m really referring to as a class all of the Persistent Organic Pollutants or “forever chemicals”, several of which are specifically used in the production of Teflon, primarily PFOA and PFOS. Which also aren’t technically /in/ Teflon, but are used during manufacturing and can be released under some conditions afterwards.