The coconut flour is just what it says - a flour made by grinding up dried coconut meat. I use the Natco brand because it's the cheapest but I'm not satisfied with it, it's too coarse.
The coconut milk powder (maggi) is definitely not what they use in BIRs. As already mentioned it acts as a thickener and if you use the amount BIRs use in korma, for example, the whole thing would just become a solid lump.
No, they're definitely using coconut flour, but a better brand than the one I'm using I think.