There have been about 24,000 people under age 40 who died from COVID-19 in the US during the pandemic. Suicide data is not available for 2021/2022 yet, but based the age ratio of past suicides (around 50% of suicides below age 40) and the total number of suicides in 2020 (around 40,000), then the number of suicides is likely to be higher than the number of COVID deaths but in the same qualitative arena.

Further apples to apples comparison is tough because kids 0-5 die of COVID but the US does not record any death below age 5 as a suicide.

A related comparison: more school age children died of COVID during the pandemic than have ever across all history died from school shootings.