but my blog page (linked below) doesn’t have the global page header and shows the meta info (despite me enabling global header and disabling meta info for the said page). How to solve this?
Yes David, but that is not intended to be on the page. The one currently displaying as you see is the header for the “posts” (and is called the page hero title and meta entry) .
Whereas I have a different header for the pages (like about, blog etc) (that is called the global pages header) which you can see on the about page for example https://imgur.com/a/Wa3aFUN.