AMBOSS does say they originate from chromaffin cells, but reading extra on this card clears up confusion here as far as I can tell. Quick google search for glomus cells confirms they are extraadrenal chromaffin cells
https://next.amboss.com/us/article/Tg06u2?q=paraganglioma#Z19c3e3f41e6f001b390bcde577291f4e