Of course it can be fixed. It depends on how much it costs.
Usually more expensive things such as transformers and inductors will not be broken because of water. The easy to break is usually the chip, the price is generally not particularly expensive.
Of course, if the water is very serious, the circuit board itself is burned out and repaired, it will be more troublesome. In addition, it still needs some level to repair this, and some chips are not necessarily obvious.
In short, repair can certainly be repaired, can be repaired, and how much it costs depends on whether you can find a reliable person to do it.