It adds compatibility between Thermal extra and Create
(meaning it adds recipe for ingots from thermal extra using the create mixer)
You obv need the 2 mods for this
Create https://www.curseforge.com/minecraft/mc-mods/create
Thermal extra https://www.curseforge.com/minecraft/mc-mods/thermal_extra T
This is not a mod, nor a resource pack, its a DATAPACK!