You and APA seem to disagree on this https://apastyle.apa.org/style-grammar-guidelines/capitaliza... but it's ultimately one of semantics since if your list of minor words are all three letters or less then it's the same.

> Lowercase only minor words that are three letters or fewer in a title or heading (except the first word in a title or subtitle or the first word after a colon, em dash, or end punctuation in a heading)