Very strong signal, can it cause problems?

I am using a BC660K and one of the deployed locations reports an exceptionally strong signal.

rsrp: -38
rsrq: -8
rssi: -30
sinr: 22

Can too strong a signal negatively affect performance or damage the module?

Well, the strong signal doesn’t cause any unusual problems, so you can keep testing

Is there any chance of such a strong signal overloading the receiver and causing damage in the long term?

no,no,A strong signal is good for both the receiver and the transmitter; the receiver may be able to interpret the signal better, and the transmitter will transmit less power