Iām not an expert, but worked on apple tree pathogens for half a decade or so, and picked up some experience.
Do you know that these are apple trees of an edible variety? Many apple trees in folksā yards are not bred to bear tasty fruit. Those these apples can still sometimes be used in cider. One thing you can do is look for a graft scar towards the base of the tree. It sounds as though itās not on a dwarfing rootstock!
By this time of the year there should be some obvious apples. If they werenāt mechanically or chemically thinned, lots and lots of them. You donāt want a tree to produce too many apples per year; itās a major nutrient sink for the tree.
As other s have said, youāll definitely want to trim it in the dormant season. Iām not sure where youāre located, but if itās a decent edible variety, there will be several diseases and pests with which to familiarize yourself. This is less of an issue in dry areas. But this is another good reason for dormant season pruning.
Apples do need to cross pollinate and cannot self-fertilize in most cases. The original planter likely accounted for this and planted varieties from different varieties that bloom around the same time. Or there may be crab apples nearby.
Hopefully an arborist can help!