It looks like there were essentially NO excess deaths so far this year among those under 25, a VERY small number among those 25-44 and then more significant numbers for the older age groups, and that those spikes corresponded pretty well with the April (northeast) and summer (most other places in the US) "COVID-19 death" spikes.
Look at "Weekly Number of Deaths by Age" and then click "Update Dashboard":
https://www.cdc.gov/nchs/nvss/vsrr/covid19/excess_deaths.htm
It looks like there were essentially NO excess deaths so far this year among those under 25, a VERY small number among those 25-44 and then more significant numbers for the older age groups, and that those spikes corresponded pretty well with the April (northeast) and summer (most other places in the US) "COVID-19 death" spikes.