Hello! I'm sorry to hear about the issue with your Realme 7 Pro's power button. The cost of repairing a power button that has sunk in can vary depending on the service center or repair shop you choose. It's important to take your device to an authorized service center or a reputable repair shop to ensure that the repair is done properly.
For Realme devices, you can try contacting Realme's official service centers to inquire about the cost of repairing the power button on your Realme 7 Pro. They will be able to provide you with an estimate and schedule a repair if needed. You can visit Realme's official website to locate the nearest service center in your area.
Alternatively, you can also look for authorized third-party repair shops that specialize in smartphone repairs. Make sure to read reviews and get recommendations from friends or family to find a reliable repair service.
Overall, the cost of repairing a sunk power button may vary, so it's best to contact the service centers or repair shops directly for an accurate estimate. I hope this information helps!