According to the government, home-produced eggs in the Netherlands are so contaminated from PFAS they are a potential health risk: https://english.nvwa.nl/documents/consumers/food/safety/docu...

Eggs from the supermarket don’t have the same problem

Conclusion from your link:

"According to RIVM, the total PFAS intake of Dutch consumers is too high. This excessive exposure is therefore irrespective from eating home produced eggs."

Yes, but the previous paragraphs confirms that “The weekly PFAS intake through the consumption of home-produced eggs exceeds the health-based guidance value (i.e. the maximum safe intake). This means that the weekly PFAS intake due to the consumption of these eggs over a longer period of time can lead to health risks. Consumption of eggs from the supermarket (commercial eggs) does not lead to excessive PFAS intake and can therefore be eaten safely”.

This is the question that was being asked.

Aren't PFAS already everywhere, like microplastics?

I recall one from Sydney which tested backyard eggs and found that basically all of them were terrible. I don't have it saved, however.