Hawe you been in coma? There has been a ww2 sized war in eastern europe for 4 years
FWIW, as one potential size metric: casualties in Ukraine (so far) are comparable to the Korean or Vietnam War, and an order of magnitude less than the World Wars (even though the world has roughly 4x the population now than in 1939). It's much more comparable to those conflicts than either of the World Wars.
I believe it's also the case that more Vietnamese died during the Vietnam War than the UK/US/France combined during WWII as well.