Sure. Fundamentally, for anything related to GARs and PSRs, definitely IRCC is the expert. They're the ones more specifically to ask the question to, but what I can tell you is that with regard to those who are coming as part of this initiative, PSRs and GARs are having to pack up their lives and then potentially load planes.... I can't speak specifically to the cases you've just mentioned, but there may be a possibility that, although the end point for the PSR knows their name and that they are coming, the “when” is still being confirmed by the actual traveller, because sometimes they're not yet ready to take that plane.
I'm not exactly sure how I could better answer the question without knowing the particulars.