The child and mother aren’t in immediate danger so leaving Russia if they have a place to live and family would probably be the best option if they don’t live near the Ukraine border.
You keep responding to things I've written with statements that do not contradict things I've said.
To wit: this thread, where multiple times I have written "get out."
Do I need to be more clear than that somehow?
Would be tough for any of the people you suggested to intervene when most on that list can’t help people who are actually in imminent danger. Contacting an MP often when you know they can’t intervene doesn’t make sense. Contact them once and see what support they can provide and go from there is a better option. Many are in Afghanistan with a bounty on their head and still are facing delays.
I have direct experience with this and you are simply wrong, from both perspective of MP's office and from depts of government that respond to MP's requests, multiple requests can make a difference: 'one time' requests are frequently treated as simple inquiries by the office, most basic response possible, and forgotten. This is one basic technique they use to 'handle' the volume of requests (anyone who requests only once does not have a serious issue).
Squeaky wheel gets the grease. Not always, but sometimes.
That said: I have clarified multiple times, MPs cannot "influence" what is happening directly. They inquire, and when those inquiries get specific (eg if escalated beyond the basic inquiries route), government depts do respond to them, and sometimes they do prioritize dealing with these requests.
That does NOT guarantee a positive response, nor a rapid response, but multiple requests can and do have an impact. (I suppose I need to clarify: not always, far from it). And because it is not a guarantee, it absolutely should not be the only thing an applicant/spouse does (repeat: get out).
Now more caveats: when I say "often", I mean periodically, like once or twice a month (max), not daily. Applicants/sposnors contacting MP's must be careful of not being allocated to the 'crazy person' list - then they will be ignored.
And another is that making excessive requests for routine files (within the normal processing times for example) will also not do anything. This applies to cases where there is a reasonable and plausible case for 'additional attention.'
You may disagree whether the case of (putative) Canadian citizens and their parents in a state of war is or is not something of interest to an MP. On this, as with other topics, you retain the right to be wrong.