E-E-A-T is not a ranking factor with a score attached; it is the vocabulary in the quality rater guidelines used to train and evaluate the systems that do rank. That distinction matters because it means you cannot optimise a number — you can only make the signals a rater would look for verifiable: who wrote this, what have they actually done, why should anyone believe the claim.
It weighs heaviest on subjects where bad information causes harm — health, finance, legal, safety — where an anonymous, undated page competing against institutions has essentially no route to the first page. On ordinary commercial topics it is looser, but the same fundamentals apply: named authors, real credentials, sourced claims, honest dates and a company that is identifiable behind the site.