The key way of helping population growth is allowing immigration, that’s what has enabled countries to flourish in the growth.

Population growth is only an issue if resources are hoarded and mishandled, which can be fixed with proper government regulations and giving parents time off, food, housing, etc.

I am basically an anti-natalist but I would be stupid to argue that mandatory requirements to fuck or not-fuck are needed or useful. If a country wants to have more kids it should try to ensure that those kids can grow up into a better country than their parents have it.