Canada, like most other global north countries (regions), cannot maintain its economy - at least in the expected way, that is of ever-increasing GDP as has been the trend for the last 75+ years - based upon birth rate alone. We are below the replacement rate. Demographics, another aspect of the so-called poly crisis whereby we see and interact with the world through the lens of the left-brain hemisphere, isolated and reductionist, rather than a necessary and more holistic "big picture" global view.

For an interesting and relatively plain language view:

https://www.ecosophia.net/an-unfamiliar-world/