Green Line Issue Note 20 Ultra 5G

[Glenntech]

I'm assuming you are talking about a green line that is on the screen all the time.
You can check if its a screen issue if you dial *#0*# on your phone keypad
This gives you 3 tests at the top of the diagnostic tests
If the line disappears in these tests, then it's likely to be an app or theme that's causing the problem
If it remains, then it's likely the screen needs to be replaced

[JAMES4578]

@Ken735  In a number of cases the green line is caused by  a faulty connection between the display and the motherboard.  Therefore if the diagnostic test fails ned to consider if you wish an inspection and likely screen replacement.  some information here https://www.androidauthority.com/how-to-fix-green-line-issue-on-phone-screen- 

[BandOfBrothers]

@Ken735 did the advice from @JAMES4578  and @Glenntech help you?