Most of the leaves are fine. But maybe 20 - 25 leaves turned yellow and fell off.
I roughen up the pot bound roots pretty good. Is it from shock? I try to water well in the hole while planting, so don’t think they are dry. Maybe they are too wet. This happened about 4-6 weeks after transplanting.
If the leaf yellowing started several weeks after transplanting, it is more likely over-watering or other problem rather than transplant shock that occurs in days, not weeks.
Our peach trees drop yellow leaves around the end of May. I used to think it was due to lack of moisture but now I think its normal. I hope someone more knowledgeable than I am about this responses.