iPhone XS Max Not Turning On Due To Power Button Problem

I am using an iPhone XS Max in Nigeria, and it has developed a serious power issue. The phone no longer turns on at all, so I am unable to use it in any way.

I took the device to a technician, and I was told that it has a “Judest power problem” related to the power button or power system. Because of this issue, the phone is completely unusable, even though I still rely on it for my daily activities.

I request that this power issue, specifically the power button or power system fault, be properly diagnosed and repaired so that the phone can turn on and function normally again. All I need is for the device to be fixed so I can continue using it as before.