Iphone screen blinking when playing music or putting it on charge

To rule out a software issue, set it back to factory settings, using your computer.

Set it up manually, without restoring the data from the latest backup at first.

Then test, if you still have the issue. If it works as expected, restore from the backup.

In case the problem comes back, you'll have to set it back again, and the backup can't be used, as it contains the error.

Check this article about how to set the phone back to factory settings:

Restore your iPhone, iPad, or iPod to factory settings - Apple Support

Has the phone been dropped, or have any parts of the hardware been replaced in the past?

No, my phone has not fallen from me before, and all parts of the device are original, but I do not know why I am facing this problem

No, my phone has not fallen from me before, and all parts of the device are original, but I do not know why I am facing this problem