Note: historically many oath dates have not been published online. That is, there are typically more (often many more) oath ceremonies than what is shown by CIC/IRCC online.
Other than the fact that many or most itinerant services ceremonies are not reflected in the online scheduled oath ceremonies, I do not know or even have a clue as to why others are not posted.
Other than the fact that many or most itinerant services ceremonies are not reflected in the online scheduled oath ceremonies, I do not know or even have a clue as to why others are not posted.