Here's an article on risks for children based on the first wave.
And here's another source for how risk changes with age.
Objective Determine age-specific infection fatality rates for COVID-19 to inform public health policies and communications that help protect vulnerable age groups. Methods Studies of COVID-19 prevalence were collected by conducting an online search of published articles, preprints, and...
www.medrxiv.org
Both are consistent with
@SWP's back BMJ reference.
Equally, neither give any information on whether the fatalities were associated with other health issues in those affected ie may not applicable to generally healthy children.
FWIW, once clinical trials are complete, I think there's an overwhelming case for inoculation of children of all ages who have conditions that make them vulnerable to be vaccinated.
I think there's an extremely strong case for all secondary school age children, where death rates are higher and reports of serious "long covid" conditions seem to be higher too.
For primary age children, general vaccination is ethically much more difficult, given the small benefit to the children themselves. *If* the virus can't be controlled in the wider population without it, it probably makes sense, but if it can be, it probably doesn't.
But these are just ramblings. I think it's a difficult one.