Hello aternos,
i would like to request you add the mod OreGen,
link: https://www.curseforge.com/minecraft/mc-mods/oregenerator
Ore gen controls ore generation in the world and is especially used in generating modded ores and materials, its is featured in the mech and magic modpack you already have on aternos. It also adds a crusher block and is usable for most common mods that add in custom ores and materials.