For some reason, Paralogue 6 doesn't show up when I have the all Paralogue patch applied.
All the others are there, though.
Marrying Kaze to Silas failed to unlock it, which I kind of expected. Reloading a save from before that and marrying Kaze to Rinkah also failed to unlock the paralogue, however, and that's kinda weird.
Edit: Actually, it seems like Paralogue 6 has just been removed from my game entirely, somehow?? Starting from branch of fates (even without the mod installed): immediately after chapter 7 of birthright, marrying Kaze to any character results in nothing.
Other children seem to work fine. On a file where Kaze/Orochi failed to unlock P6, a pairing of Silas/Hana worked perfectly fine, playing the deeprealms cutscene and unlocking P5.