There may be an incorrect statement regarding the Norwegian P-8 in the linked article.
The author states that that "they won’t enter into active service until later this year", but the source the author links to doesn't actually make that claim. All it says is that the P-3s will keep flying until sometime in 2023, when the "P-8 is ready to take over". I don't think that implies that Norway doesn't already have some P-8s in active operation.