Even if it makes roots, its not long for the world. Dont waste your time or the hormones.
For mulberries, the Australian white aka green must be grafted.
Do you know why it wouldn't work? Just curious because I couldn't find any articles about it online. All I saw was videos of people doing it and growing trees but they never reported back about fruit production.
I think the difference is, you don't get a tap root, maybe not a problem if you want to keep the tree in a pot, or are using drip irrigation, I also watched those videos, I wan't to try it, specially using of Aloe vera, and/or cinnamon as rooting hormone.
Mango can be marcotted as well, even tissue culture, marcotting is something I would also like to play around with.