Does the POCO X7 support reverse wireless charging?

It does not support reverse wireless charging.
Reverse wireless charging (also known as wireless power share or reverse charging) is a feature that allows a smartphone to act as a wireless charging pad for other devices. This means that a phone with reverse wireless charging can transfer power to other devices, such as smartwatches, earbuds, or even other smartphones, using the same wireless charging technology.
The smartphone with reverse wireless charging has a built-in wireless charging coil that can emit electromagnetic energy. When another device is placed on the back of the phone, the energy is transferred from the phone to the other device.