Can anyone help me why do I have a pink line/spot in my camera only appears at more than 1x

Hello sinitabasak,

First start by ruling out any accessories that may be conflicting by disconnecting any cables, casing, etc.

You may also try carefully examining the lenses on the rear side of the device to see if any have visible issues.

We see you've referenced the most useful article to address camera issues, If the camera or flash on your iPhone, iPad, or iPod touch isn't working - Apple Support. Please refer back to this article to try wiping the lens with a microfiber cloth.

If you continue to have issues you may wish to get the device inspected and potentially serviced. This page can help reach out to Apple Support to explore available options in the area: Apple Support

Cheers.