Lol. No wonder you are having trouble with your propaganda. Worldometer - https://www.worldometers.info/world-population/ukraine-population/ - shows the population of Ukraine to be less than 44 million.

If the pop. was 730 million at one time, that only goes to show the success Russia is having there.

To be fair, most people moved out, not wanting to participate in a US war. Only the poor of the land couldn't afford to move. So they stay and die right along with Zelensky's militia.