something like Roughly/Just Enough Resources that shows in what dimension and at what level a certain block generates

https://www.curseforge.com/minecraft/mc-mods/roughly-enough-resources

I can finally close this! This is now provided by EMI Ores!

• https://www.curseforge.com/minecraft/mc-mods/emi-ores
• https://modrinth.com/mod/emi-ores

I am aware of RER,, and this functionality is already on the todo list that can be seen in the README! :)