Ok … I got excited too soon. I should have been clearer with my question. While I might want to actually update the page (tab/window) title, I was actually referring to the page content itself; i.e. the title of the page.
Basically, the content of this code that is added to every WP page:
I want to override the standard behavior of showing the username on the single member page, instead pulling the first_name and _last_name from the wp_user table (which are required fields as part of membership registration using MemberPress).
Is there a bp or wp action or filter to allow me to modify the standard page content “title”?