There’s a far easier way to fix the imbalance than making more girls: cull the male herd. That’s why we have wars.
Seriously, war is the eventual solution to large societal imbalances and that is just one reason why this practice is ultimately life threatening to both sexes.
I’ve read theories that the reason you see so much Muslim violence is purdah and polygamy.
Rich men take multiple wives, so many young poor men have no potential brides in the community. And they have no outlet in the sex trade or “loose women” as they can to a degree in Asia.
So you get more young men with no hope of satisfying the sex drive unless taking sex slaves in war or dying a martyr to get a harem in heaven.