Sprint Ultra 30000mAh can't charge my devices by PD

Hello! I have Sprint Ultra 30000mAh (model PB-Y7)
When I try to connect to the power bank via USB-C -> USB-C, it does not give off energy, but tries to charge itself. I tested it on several devices - macbook air, Xiaomi air, ipad pro, redmi note… The power bank always takes energy instead of turning on PD mode. What could be the problem?