Hello, if your Mate 20 Pro is unable to charge via wireless charging, try the following steps:
1. Verify that there is sufficient distance between your wireless charger and the Mate 20 Pro, and that there are no obstacles between the two.
2. Check that your wireless charger is working properly. You can try placing other devices on the charger to see if they charge properly.
3. Check if your Mate 20 Pro supports wireless charging. If your phone does not support wireless charging, then no matter how good a wireless charger you use, it will not be able to charge your phone.
4. Check if your phone is in charging mode. Sometimes, your phone may not automatically enter charge mode and you need to manually switch it to charge mode.
If the above steps have been tried and the problem persists, contact your phone manufacturer or wireless charger manufacturer for further support and solutions.
This may be the power supply or charging protocol does not support the reason, you can replace a charger to try.