There may be a number of reasons why your peony parrot may be chirping while sleeping. First, they may be dreaming and making sounds. Parrots may snore, talk, or imitate other sounds during sleep, which are all normal phenomena.

Secondly, external stimulation may also cause peony parrots to make sounds while sleeping. For example, if someone passes in front of the parrot's cage, or there are stimulating objects such as noises or flashing lights, it will attract the parrot's attention and cause it to make sounds.