The excellent Our World in Data published a tool for simulating international population trends by 2030, 2050, and 2100 under different assumptions for fertility rates, life expectancy, and net migration rates.
Their default settings for Canada put us at 49 million by 2100 (compared to 53 million under UN projections), not even 10 million above our current total of around 41 million. And not even halfway to the goal articulated by the Century Initiative and the book Maximum Canada: Toward a Country of 100 Million.