This is actually very poor statistics.

Take a look at the actual study: https://www.jhep-reports.eu/article/S2589-5559(22)00122-7/fu...

And look at table 3.

They are testing 6 different types of PFAS, and only 1 is statistically significant.

They need to be using the Bonferroni Correction because they are checking multiple hypothesis. To do that, you divide the required p-value (0.05) by the number of tests (6). If you do the Bonferroni Correction, none of the PFAS is statistically significant.

Relevant XKCD: https://xkcd.com/882/

Thus the real conclusion is that the study did not find any statistically significant link between 'forever chemicals' and liver cancer.