Since you asked. For the entirety 2019-2020 188 children (up to 17 YO) died from the flu. Across all of the US per the CDC. The actual number is likely significantly higher. But lets say its double and round up. For the whole year 400 deaths. Since Jan 2020 to now, around 450 died from Covid, with the numbers that we have now that are subject to change. But lets be fair and double that. 900 in the last year and a half. Almost all of that time pre-delta. Also with several months of general shutdown and a year of no school to minimize the spread. Unlike the wide open flu.
So what is going to happen in the next four months as delta goes after the kids more than anyone else? Also if, heaven forbid, it spreads beyond where its spiking now in the south? Nobody can really say with certainty. There are way too many variables. It will also depend on who can or do among the age group get vaccinations. For the flu in 2019-2020 it was actually fairly high nationally. Much more so than covid shots atm since it was only recently approved for 12 and up.
In the end, its without question all very complicated and a simple question and answer or comparison simply cannot cover it. In spite of those that try to in the hope of convincing others that they know what the hell they are talking about. You cannot rely on information for such complicated subjects that come from talking heads, political leaders, radio talk shows, *news* websites, memes, or a variety of other things.
And no, not forum posters either.