My modern frontend experience is pretty limited, but AFAICT there is no "this year's recommended header list." Rather, these issues are presented to developers as a bunch of independent problems, each one of which you have to individually hear about, research and understand in depth before you can figure out what you actually need to do to make your application secure.
If the website works from a user perspective, and it's not being actively attacked in a way that leaves obvious signs in normal operations monitoring, then a lot of IT orgs simply won't have the mandate or the budget to go Googling to find out the very latest recommended HTTP headers.