I have the Huawei mate 20 Pro in which also inductive charging is possible.
Question: If I charge with a USB plug and an inductive one, does the phone charge twice as fast or does the part fly around my ears?
Neither. Clearly you can't charge the phone faster, it would also be technical nonsense to allow such loads through the circuit. One will definitely not have constructed the device, manufacturers take no risks in something like that. In practice, the software will likely limit the charging current and not allow damage. In any case, the coil can't charge at the same speed as the cable, so in theory the design would not be efficient enough to actually double it.
But I would not provoke anything, because logically, the device with OEM power supply and cable (Huawei SuperCharge) already charged at the maximum speed, in a safe charging can be guaranteed. Hidden ways to increase the charge current will therefore either not exist or, in an emergency, damage the hardware.
With the app "Ampere" you can see the charging current. This is determined automatically and can (and should) not be changed by interventions.
