Prefab homes are very popular at Scandinavia and Finland. Eg Honka https://honka.com/gb/en/dream-plan-build/custom-home-path/
Precast concrete has been used since the 1950s: https://www.elematic.com/learn/what-is-precast-concrete/
This is probably a result of: 1) Construction companies are larger and are building on multiple plots with the same concrete apartment building or 10-20 identical or similar wooden buildings 2) The Finnish love affair with family lakeside summer cottages has got people used to ordering a building 'off the shelf'