Hi @haseebayaz
Try replacing the LCD screen on the watch and check if that resolves the problem.
Here's a teardown [https://www.youtube.com/watch?v=LW78YVX6E1I|video] that may help.
Search online for [https://www.google.com/search?client=firefox-b-d&q=Huawei+Band+6+lcd+screen|Huawei band 6 LCD screen] to find suppliers that suit you best. (supplier examples only to show part and possible cost of part)