Approx 38k people killed in cars in 2020: https://en.wikipedia.org/wiki/Motor_vehicle_fatality_rate_in..., lets assume the same for 2021 so 76k dead.
Approx 850k people killed by covid https://www.cdc.gov/nchs/nvss/vsrr/covid_weekly/index.htm
So covid killed more than 10x as many Americans as cars did (not including pedestrians). That doesn't take into account age though. CDC shows only 727 dead in the 0-17 age range.
For cars, it seems that at least in 2006, about 2000-2500 children 16 and under were killed in cars: https://crashstats.nhtsa.dot.gov/Api/Public/ViewPublication/...
Seems like cars are a few times more deadly for kids than covid, but covid killed way more Americans of all ages. Not a great analysis, but it's as good a job as I'm going to do.
Do you have data to back that up? Genuine question. A lot of people pull numbers out of thin air when the topic is touchy.