Does Standard Bank own a stake in Root, or do they just supply infrastructure/services? Can this interact with FNB or ABSA accounts? Is it international? In sh

Does Standard Bank own a stake in Root, or do they just supply infrastructure/services? Can this interact with FNB or ABSA accounts? Is it international? In short, what are the limits? Also, I just want to say this is really cool. I've wanted something like this for ages.