No, at this point we can be pretty certain that this disease doesn't affect young children as badly as flu. Plenty of kids have tested positive for COVID19, but almost none have died. This disease is so pervasive we'd see excess showing up in that age group and we just don't. Kids just don't seem to get as sick as adults.

What we don't know is how effective kids are as transmission vectors. If COVID19 spreads rapidly through a school and kids can get thier caretakers sick, thats a real problem. The limited data we have in suggests that not only do young kids not have limited disease, they also don't spread it easily, but all the data I've seen is almost anecdotal.