Basically it's a way to prevent Republicans from voting against Ukraine funding, by bundling them together. Hopefully the amount of Israeli funding is a token amount in comparison to the Ukraine funding. Before the increased conflict in Israel/Palestine broke out, the Biden admin had been floating an idea for a similarly sized bill that would be almost all Ukraine funding. The idea being pass one additional large Ukraine bill to cover their needs for a long time, since republicans are increasingly opposing the small regular bills. So I'm hoping the great majority of this will be for Ukraine, I haven't been able to find a breakdown yet though.