Hi mharariz295
What's your phone’s firmware version (Settings > About > Software information > Build number)
Please charge your phone to full before going to sleep, and leave it unused and unplugged overnight. Please capture screenshots as below on the next morning before you use your phone and tell me how many percentage of power the phone has consumed overnight
1. Battery: settings> Battery (Device usage since full charge)
2. History details: settings> Battery> Advanced battery usage
Thank you:)