SeedOverlay feature by simulated world instance

[xpple]

Is your feature request related to a problem? Please describe.
The libraries used only generate pieces of the world and does not support 1.18 overworld terrain generation.

Describe the solution you'd like
A fake world would be created that almost perfectly matches the seed's default terrain.

Describe alternatives you've considered
Only consider surface blocks (as the libraries used can in fact generate those). An advantage of this would be that it wouldn't be affected by anti-xray plugins.

Additional context
I don't know how to make this version independent, which is really important. Thoughts?

[pixo2000]

when for 1.20?

[xpple]

No ETA, but probably not very soon.