There is no such thing as a one-size-fits-all website SEO audit. While some technical parts are essential for all websites, a contextual analysis should conduct at the start of an SEO audit to identify priority areas for that particular website.
How many 301 (permanently moved) are there on the site?
How many 302 (temporarily shifted) are on the site?
How many 401's to 404's errors are on the website?