Semi-related, but I did recently wonder if China's real-estate bust might serve as a strong fertility support measure / incidental pronatalist policy.

Tier-3 and tier-4 cities supposedly saw 30-50% property value declines, setting them back more than two decades. If real estate was really holding back families, as is often stipulated, this might reverse that.

Otoh, rural Japan has lots of cheap or even free real estate but it doesn't seem to support fertility rates at all.