The study is more accurately characterized as “We tested beer in areas where we knew the municipal water supply was contaminated with PFAS and sure enough there were PFAS there.” It’s worth noting because it’s not like anyone is doing any testing and people don’t really think about where their beer comes from, but it’s not like it’s particular to beer. You’d probably get the same results with soda unless for some reason soda manufacturers are RO’ing their water.