First result is good: pkg.go.dev/go/parser
Second result looks like a content farm: golangdocs.com/golang-parser-package
Third result looks like a valid Chinese search result, but it's a duplicate of the first result and also _very_ weird that it would rank that highly: golang.cm/pkg/go_parser.htm
Then the next two results are content farms: golangexample.com/tag/parser/ golangexample.com/a-dead-simple-parser-package-for-go/
Then a valid result from a low-starred GH project: github.com/prataprc/goparsec
Then a good result: blog.gopheracademy.com/advent-2014/parsers-lexers/
Then a random seemingly unrelated academic paper: www.arxiv.org/abs/1505.08075
Then a valid result from a high-starred GH project: github.com/alecthomas/participle
Then another content farm: awesomeopensource.com/projects/golang/parser
kagi also has a bunch of the content farms, but the ranking is better IMO. Good luck!