Are you pruning? When?
Does it leaf out well?
We would like to see some photos, which could be attached right to this reply.
Both close up of the leaves and their arrangement on the branch, and the whole tree, including where it goes into the ground.
I sent images but not heard anything since.
We have not received your photos.
We cannot say for sure but there may be a failure in the graft. It is up to you if you want to keep it.