If Canada would have achieved the same level of natural immunity

What level? There's no reference to natural immunity in that paper you cited.

The only reference to immunity in it was that some people think some form of partial immunity might have been obtained by the locals because there were local coronavirus strains there that do not exist in Canada. Any partial immunity South-Saharan Africa's residents might have had was not available in Canada.

The only "natural immunity" available to Canadians is through getting the virus, but 2% of the people who test positive for it die. See the "Closed Cases" box at https://www.worldometers.info/coronavirus/country/canada/.

our number of deaths would be similar to South Africa's

Why would we want that? South Africa's fatality rate from covid is about twice as high as ours. Per million residents ours is 789 (https://www.worldometers.info/coronavirus/) and South Africa's is 1,503.

Boasting that Canada is somehow better

You were spreading misinformation. You said "South African data suggests wide spread natural immunity not vaccination is the cause of the low levels of hospitalizations and deaths."

You brought up Africa, not me.