[Bug] Makes superflat world generate as normal one

[MyreneGourem]

What Minecraft version(s) does this apply to?

1.20

Project version

v2.5.1

Mod or datapack version?

Mod (Forge)

Describe the bug

When trying to generate a Superflat world a normal one will be generated instead.

Additional context

No response

[catter1]

Please see #113