“Paper” looking icon on the lock screen

This person asked the same question.

iPhone 15 Plus screen weird - Apple Community

I don’t know how to fix it with the iOS Weather App widget, but there is an alternative I have found that works.

First, download the Weather Channel App and set it up for your zip code, etc. Then, go to your Lock Screen, hold it, then remove the iOS weather app widget. Then you can remove it and replace it with a similar read out icon in your Home Screen by scrolling down and select the Weather Channel app. Then toggle to the type of read out that is similar. This takes the white paper icon away and you can still see what the weather is like the iOS Weather app. Hope this helps!

Yes. I see it too and it won't go away

I just discovered this article explaining what’s happening.

Apple Weather App Widget File Icon