PFAS are used in so many different applications it would be difficult to list the alternatives comprehensively. But it can be confidently said that, health and environmental costs aside, there are no better alternatives for their current use. Which is a huge part of the problem (similar to the BPA/BPS issue).
PFAS in DWR / water resistant applications is being replaced with silicone-based tech and some other novelties.
PFAS in coated paper goods can be replaced with silicones, sulfuric acid baths, etc.
PFAS in machinery could be replaced with food-grade lubricants like mineral oil, etc. (or just more frequent cleaning)
Give me some other common applications and I'll help think about the alternatives
PFAS in DWR / water resistant applications is being replaced with silicone-based tech and some other novelties.
PFAS in coated paper goods can be replaced with silicones, sulfuric acid baths, etc.
PFAS in machinery could be replaced with food-grade lubricants like mineral oil, etc. (or just more frequent cleaning)
Give me some other common applications and I'll help think about the alternatives