Genocide is not a crime that goes by the numbers. It’s not about the number of children and civilians you killed. Those are just “regular” war crimes. Those are being committed by both of those countries, and arguably Israel is bigger on mass murder right now.
Genocide is where you kill or displace people to erase their cultural or national identity. In that, they are committing the exact same crime. Genocide is not when you kill Ukrainians or Palestinians, but when you declare that they do not have a right to exist, and effect that with force. Bombing a Palestinian hospital or a Ukrainian one is “just” a crime against humanity, mass murder, war crime, goes against the Geneva Conventions.
If you make one Palestinian leave Palestine, or take away one child from a Ukrainian family and raise them as Russian, so that there are less Palestinians / Ukrainians in the world, that’s genocide.
Both Russia and Israel are committing one single count of genocide each right now, with Israel committing a lot more murders, though Russia is trying their best too.