I just unpackaged my phone and installed the latest software updates. My S10 is overheating and it sounds like a jet engine when it is on the wireless charger. Both wireless chargers I've placed it on cause the jet engine whistle and both chargers are OEM Samsung. One is a fast charging model the other is regular. Chat has not connected me with anyone to speak with.
The Samsung wireless chargers have a fan in them. Is the noise comming from the charger or the phone? You should be able to feel a slight breeze coming from the back of the charger. The noise should subside the more you use it. If not I suggest call Samsung support.