There are 8.14 million children in Canada (0 to 19 years old).
As of September 10th, 2021 a total of 15 children (0 to 19 years old) have died of covid throughout the entire pandemic.
In other words, 0.0002% of children in Canada have died from covid.
https://www.statista.com/statistics/444868/canada-resident-population-by-age-group/
https://www.statista.com/statistics/1228632/number-covid-deaths-canada-by-age/
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The US has 74 million children and 364 have died from covid throughout the entire pandemic.
0.0005% of US children have died from covid.