In the fall the graft works but the rootstock and scion won’t grow much.
So I keep all the leaves on the rootstock or the scion.
Sometimes I do a veneer graft with 1 nurse leaf.
I only pinch the tip of rootstock so the leaves feed the tree.
In spring I cut off the rootstock above graft and remove nurse leaf to force new bud.
Sometimes I do cleft graft.
The scion should be same or up to 1/16” bigger than rootstock.
Keep all leaves on the scion.
Side graft of soursop on cherimoya
This is the biggest scion I have at this moment
Biggest Atemoya scion I used had 14 full size leaves.
About 2 feet long
Cut the end of leaf off.
Bag each leaf with water
This scion is small so the leaves clump together.
I cut all to same height.
Put all cut leaves inside a water bag.
I use sandwich ziplock bags.
Add some water to big bag then cover whole scion.
Hide from sun.
After 7 weeks open bag a little each day to get the leaves to acclimatize to dry humidity.
With all these leaves the rootstock and scion will grow more than graft with no leaves.
Good luck.