The best data summary I’ve seen [1] suggests that COVID-19 IFR for kids is 0.01% or less which is in line with the COVID-19 stats you cite. The same data summary [1] suggests that flu IFR for kids is probably the same order of magnitude but not “vastly less”.

I think COVID-19 vs. flu has gotten way too much press though and it’s worth noting that IFR in kids is low for both relative to IFR in adults. What I would really want to learn more about are the long-term effects of disease and how that varies by age. We know a bit about that for flu or polio or RSV but not so much for COVID-19 because it’s still so new.

[1]: https://github.com/mbevand/covid19-age-stratified-ifr