Other examples, would be: (in my view) Don DeLillo’s novel about Lee Harvey Oswald (ie Libra)
and, Peter Carey’s “Illywhacker”… (an Australian one)
Re, the Q: ‘To what extent is the analysis of historiographic metafiction related to narratology?’
(My, current) Answer: In my understanding, it is absolutely related to it… ie An analysis of a historiographic metafiction novel would certainly involve narratology. ie The poetics of how it was written, what the story structures are, and so forth.
In a way, historiographic metafiction is ‘storytelling on steroids’. Taking history, and rewriting it. Isn’t that what happens to history anyway? (ie “History is written by the victors”… well unless you count postcolonial theory I suppose. As that is meant to re-include the invaded culture/s…)