Depends how strong the ties are in home country (apartment, job, etc). If the strongest case you make is "really, she'll leave, we promise", it may not get there.
It seems like a bit of a double edged sword...
On one hand, we would need to show that she intends to return to Russia if she's declined, because of strong ties.
On the other, it sends the message that if they do approve her PR application, she has strong ties to Russia, so she doesn't intend to live in Canada.
Damned if you do, damned if you don't.
But no-one can tell you what the odds are. Your better hope is that your PR app is approved before then, although I don't recalll when you applied.
Our AOR was early June 2021. Things seemed to be moving nicely, until we had a request for additional documents. Now it seems as if things are at a standstill. Other people from our VO seem to be getting updates, but they haven't checked our documents yet. I've made a request for notes from the IRCC, but it's been over a month, and nothing yet.