So for sanity, when they sell 'baking tray paper' I see in the composition that it is silicone coated. Is that baking paper PFAS/PFOAS contaminated at all? If

So for sanity, when they sell 'baking tray paper' I see in the composition that it is silicone coated. Is that baking paper PFAS/PFOAS contaminated at all? If not, then why on earth would you not just coat all paper with silicone for waterproofing, it cannot be more expensive that PFAS based waterproofing, right?