Diseased peach tree

Question

Tree is young and has developed a leaf lumpiness on most leaves (see photo).

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Answer 1

I'm afraid that this a classic case of peach leaf curl, a very common virus disease. You can control by spraying with a fungicide in Jan/Feb and again now.
Pick off all diseased leaves.
Moving the peach indoors under glass can also work.

Answer 2

This is Peach Curl disease that can be treated with a fungicide.

Here are a few links with more information.

https://www.gardeningknowhow.com/edible/fruits/peach/peach-leaf-curl.htm
https://www.gardeningknowhow.com/edible/fruits/peach/common-peach-diseases.htm