When making an old world type infinite, new caves do not generate below y-level 0 and world height remains at 256 instead of 320

When I got the 1.18 Minecraft update on my Nintendo Switch, I made a copy of a world, which was created with the Old world type, and I converted it to an infinite world to see how 1.18 generation would affect my world. However, once the world was converted to infinite, the new height limits were not applied to my world. In both previously loaded and unloaded chunks, caves were also not able to generate below y-level 0.

This is caused by the game not switching the baseGameVersion to * after the world has been converted, which keeps the converted world stuck with 1.17.40 generation.