Chz
Stark Raving Sane
While they could certainly use more manpower, the fact is that they struggle to equip and train the soldiers that they have. So unless they want to move to the tactics the Russians are currently employing, pure manpower doesn't do them much good unless it comes with an increased training capacity and more weapons. That's the reason you haven't heard them complaining about it as much as other things.No one thinks a sheer lack of troops is hindering the Ukrainians?
Edit to add: Ukraine already has one of Europe's largest armies. Manpower is only a problem because of who they're facing, not because it's something they're inherently short of. Sending 10% of the active British Army would hardly be noticed in terms of pure manpower, though you'd hope they'd arrive a lot better equipped and trained. I stress hope.