Do you have a source about PFAs from rice cookers? My understanding is that Teflon in cookware, used at recommended temperatures, doesn't release PFAs. It's the Teflon manufacturing process that releases PFAs.
Teflon rice cookers don't really release PFAS at appreciable levels. Teflon is remarkably stable (and one of the reasons it was DuPont's miracle discovery).
PTFE's degradation point is 260C, but rice cookers only cook up to 100C (controlled).
The only source of PTFE is if they scratch or flake off over time, but this is usually visible.
Teflon cookware are more problematic in non-stick pans, where they do get heated to higher temperatures, especially for stir fries.
