Would avoid using a consultant and hire a lawyer if trying to retain PR status. When did your parents land as PRs and how much time have they spent Canada since then? How much time have they spent in Canada in the past 5 years? Do they have proof of why they could not travel to Canada other than a short period during the pandemic? Travel has been possible for a few years at this point so unless they can show why they could not travel for example undergoing medical treatment that would not allow them to travel. They would need to provide hospital records showing treatment records and doctor’s note explaining diagnosis, prognosis and why they could not travel in order to show H&C. In general they would have to show that they returned to Canada as soon as possible if using the pandemic as a reason for not being able to travel for example. The fact that why have each other also means they are not alone.