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I would take them off this first year. This will help the trees focus more on growing roots and becoming established rather than on growing fruit. It will make a healthier tree in the long run.

Timely thinning of small to medium sized peaches significantly increases fruit size and helps maintain tree structure. However, if not thinned properly, peach trees may go biennial in their bearing habit. In addition, trees that are not thinned or are thinned too late (60 days after bloom) may fail to produce flower buds or fruiting wood the following year. In some cases, these trees will automatically drop a number of seemingly healthy fruits when overcrowded. Sometimes though it is necessary to do it on your own. Hand pick fruits as needed for continual growth of those remaining.

Here is an article that you may find helpful: https://www.gardeningknowhow.com/edible/fruits/peach/peach-tree-care.htm

It sounds like you have a peach borer problem. This article will help with that: https://www.gardeningknowhow.com/edible/fruits/peach/peach-tree-borer.htm

This article should help: https://www.gardeningknowhow.com/edible/fruits/peach/peach-tree-fruit-drop.htm

These articles will help:
https://www.gardeningknowhow.com/plant-problems/pests/animals/get-rid-squirrels.htm
https://www.gardeningknowhow.com/edible/fruits/fegen/protect-fruit-tree-birds.htm

Splitting or peeling bark commonly occurs in freezing weather. If it is not weeping or splitting further, then you should just leave it alone to heal on its own. If the area of peeling bark is widening, you can try protective paper (sold at nurseries) to help hold it together while it heals. Do not cover the wound with tar or any other permanent substance as this can trap disease in the wound. In the future, you could try wrapping your trees during winter to provide some insulation.