Even though I just discovered the config folder for all of the mods when I edit your CottonResources.json5 when I boot up Minecraft it still floods every little ore possible into the world (my edits get erased when I boot up Minecraft) I only want 3 of the ores like specialty rare 25 durability 15 swing speed 10 attack titanium and steel with stats between iron and diamond. With materialization you can change ore properties.

I have the same bug. I try to disable generation of all ores, added by this mod. But after edidting the config file and restart the game, ores list resets .
My config:

"generators": {
	"cotton_ores": {
		"ores": [
			"c:copper_ore",
			"c:copper_nether_ore",
			"c:copper_end_ore",
			"c:zinc_ore",
			"c:zinc_nether_ore",
			"c:zinc_end_ore",
			"c:silver_ore",
			"c:silver_nether_ore",
			"c:silver_end_ore",
		],
		"min_height": 6,
		"max_height": 64,
		"dimensions": [],
		"biomes": [],
		"cluster_count": 0,
		"cluster_size": 0,
	},
},

After restart the game, list resets to:

"generators": {
	"cotton_ores": {
		"ores": [],
		"min_height": 6,
		"max_height": 64,
		"dimensions": [],
		"biomes": [],
		"cluster_count": 0,
		"cluster_size": 0,
	},
},

Also, I've tried variant: set "override_vanilla_generation": true, and add:

"minecraft_iron": {
	"ores": [
		"minecraft:iron_ore",
	],
	"min_height": 40,
	"max_height": 64,
	"dimensions": [],
	"biomes": [],
	"cluster_count": 64,
	"cluster_size": 6,
},

After restart this resets too.

Are you referring to ores being enabled or are you trying to disable some ores?