I called the garden center. Huge local one, etc, etc, and I know the owners and he sold me the trees. He asked if they were dry, or overwatered, which will stress newly planted fruit trees and they will drop leaves even though they look healthy. I pointed out constant heavy rains we've had for months, and that I haven't been watering otherwise cause I didn't want to over water. He said didn't matter, and to stick my finger down into the root ball near the trunk and see if it feels relatively dry compared to the wet soil around it. Or, if was over wet.
Soooo....I ended up adding half a bucket water to each. THey were barely moist to the touch even with the rainfalls we've had. Lessened learned. If you have fairly well draining soil like me, and put out new tress, especially fruit trees, give the root ball the finger and make sure you keep up the hydration regardless of rain fall. They will recover and put out new leaves in short order, but I will be going back to my several times per week water bucket for a few more months.
Upside, peach tree didn't drop it's 3 new peaches, and apple tree didn't drop hte 3-5 blooms that will be apples. If htey did fruit up I was gonna let them keep a couple just to taste test my variety picks. My established apple is a gala, and should do well this year since I added back a pollinator.