Hi is there anything I can do about peach curl on my peach tree?

If you can still buy Bordeaux mixture this is the best product for peach leaf curl which is a fungus.
If you can get hold of it, spraying with an infusion of horsetail is also effective as an organic solution.
Sheltering the peach from rain during the winter is the best as the spores infect the plant in the rain. We have a single peach tree which is never affected because it grows against the south facing wall of the house. The ones out in the open are all affected.

Bordeaux mix. is still available and is even considered to be 'organic'... well yes I suppose it is but it isn't very nice in reality. We use in the alpine house