What do you think is wrong with my peony plant?

Question

I would like to know from picture what could be wrong with my peony plant and how to help it

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Answer 1

This may be Foliar Nematode
Symptoms include:
Wedge shaped sections of the leaf turns yellow then reddish-purple
Purple area of the lea limited by major leaf veins
Most common late summer to early fall
Seen of the lower leaves first, but can spread to the entire plant
This link will help you.

https://www.peonysociety.eu/foliar-nematodes-in-peonies/