Vertical green line
I have a vertical green line on my screen display
iPhone X
Mar 2018 sberman Apple Recommended post re. "green line on the right edge of the screen of iphoneX" - https://discussions.apple.com/message/33188676#message33188676 -->
About the Super Retina display on your iPhone X, iPhone XS and iPhone XS Max - Apple Support
https://support.apple.com/HT208191
The iPhone X was discontinued in September 2018 so any repairs would not be covered by warranty.