If we had ranked choice you'd have a Liberal/NDP supermajority. Vote splitting on the left is the only way the CPC has held on.
That's unlikely to be true, because there would be way more viable parties. Maybe you would indeed have a supermajority of left-of-center parties but you can't conclude that they'd all have the same Covid restriction policies as the current ones.
Ranked choice (any form, not just IRV) voting systems without proportional allocation (whether multimember districts with STV, mixed member proportional, or party-list proportional, or something else) do not significantly increase the number of viable parties.
On the other hand, I'm amazed that 5% of the population voted for the People's Party of Canada -- a party which had no hope of winning. This absolutely split the vote on the right enough to make the CPC lose seats.
https://globalnews.ca/news/8212872/canada-election-conservat...