https://www.youtube.com/watch?v=O7nQP5VW3RM
This mod simulates diamond and ancient debris generation for a given seed and projects it into your world. Because of this it can bypass orbfuscator and so on. It will only fail if the server uses a different way to generate ores.
The mod is for 1.16. An improved version for newer MC versions can be found in the meteor rejects addon for meteor client as Oresim module. https://github.com/AntiCope/meteor-rejects
/diasim seed [worldseed](default: 0)
/diasim active [ON/OFF]
/diasim range [number](default: 100)
/diasim checkOpaque[ON/OFF](default: OFF)