https://prnt.sc/voikhw
I remember a mod, I think Industrial Revolution, could change the settings for its added ores on the different default map presets.
Request for Krastorio 2 to do the same? Thanks :)

Provide me the code and I will add it. Actually they are balanced on "be rare", and in each kind of map fit enough well

I apologize, I am not a programmer but I do believe I have isolated the code from another mod: https://gofile.io/d/o8ihJL
I am just not sure where you would place this code in your mod and I don't understand certain syntax in this. Aside from replacing the names of the ores from the other mod with yours, I am clueless. If you choose not to pursue this that is fine, I respect you entertaining the idea.