Doesn't really rule out the P-8, apparently Norway has had P-8's since 2021, in order for an aircraft to be 'fully operational' you have to do training/exercises, fly the aircraft. If the Norwegian Air Force wanted to have the P-8 fully operational by Jan 30 2023, they had to have been flying sorties before then.
Tom Clancy would disavow having served as inspiration if the story did not feature secret prototypes! (I know nothing about Tom Clancy and his works, that's just how I imagine them to be like: not full-out "future gear porn" but a well-balanced moderate dose of it?)
https://www.arctictoday.com/norway-takes-delivery-of-boeing-...