Did you just transplant that tree? I’ve never seen a Jaboticaba that’s dropped all it’s leaves like that. Is there any sign of life on it like leaf buds?
If you recently transplanted it and damaged a lot of the roots, you can prune/head back a lot of the taller growth. When I transplant trees, I like to prune back the vegetative growth so that the mass of the above ground growth is similar to or less than the mass of the roots. This is to ensure the tree is balanced in terms of water balance and so that the tree doesn’t die.
Simon