Some people have Soursop fruits from their trees, here in SoCal.
I have a small grafted tree in 7g pot, with 5 flowers right now.
I leave it outdoor, under eaves.
Soursop is easy to graft.
I graft them in late summer and early fall.
I haven’t have a failure.
This is a 9/16 cleft graft with all leaves attached to scion.
Cherimoya rootstock, cherilata interstock, soursop at top.