Pink vertical lines
There are pink vertical lines all over the screen suddenly. How to resolve it?
iPhone SE
Pink or green lines are invariably hardware fail.
You should arrange a service or repair
https://support.apple.com/iphone/repair/service
Anything other than Screen or Battery may be a replacement phone and the price is in the article.
You can see additional service information within the following article:
Get your iPhone, iPad, or iPod touch ready for service - Apple Support