can we have add the mythic metals as trimmable materials?

[Sinogard]

I've tried to do it via datapack but cant figure out what im doing wrong.
This zip is the datapack i tried to make...
mythicmetalstrims.zip
Heres the Trim gradients i put in a texture pack.
Mythic Metals Trim Colors.zip
I think it would be better to have the materials natively supported anyway but I'm willing to continue the data pack route once i get over this cold.