I got scions from Florida 10+ years ago, grafted it on Cherimoya which worked fine. It grew to 25 gallon pot size rather quickly before I gave it to a friend in San Diego.
It overwintered fine but did not flower in my recollection.
I think there must be a tree at Fruit and Spice or in some accessible collection that probably just isn’t hand pollinated or doesn’t fruit . Fruits are reportedly good but haven’t heard of it fruiting in US.
What is your rootstock ?