No, wireless chargers can't act as power banks directly. Wireless chargers are used to charge devices that support wireless charging, and a power bank is a portable charging device with a battery that can charge a variety of devices. Although the wireless charger can charge devices that support wireless charging, it does not have a battery itself and cannot store electrical energy, so it cannot act as a charging bank.
No, because there is no battery in the wireless charger itself, can not store electricity.