Wrong Electrical Boxes for These Sconces

This is the mounting bracket for a sconce / light fixture . The fixture itself is exactly the same size as the bracket.
So it’s unfortunate that the electrician used an electrical box that is too large . As you can see, the blue box shows on both the left and right sides of the light fixture.
(I will also add that I think this light fixture is narrower than most – I suspect it was made overseas where boxes and codes are different from here.)
In addition, the blue box juts out from the wall and will create a bump under the wallpaper , plus prevent the paper from adhering tightly to the wall . The jaggedly cut drywall will leave impressions under the paper, too.

Here the plastic electrical box is recessed better into the wall. But there are still gaps on the left and right sides of the bracket.
To get the wallpaper around the brackets without gaps showing , I removed the brackets, and then brought the wallpaper in to cover the electrical junction boxes by about 1.” (no photo)
If the electrician needs more space for his wires , he can always trim the wallpaper back a little.
In the instance of the box in the top photo, there will still be wallpaper that can’t sit tight to the drywall , but once the sconce is replaced you really won’t notice.
I also had the option of leaving the mounting brackets in place and then placing the wallpaper over the metal plates. But first of all, I think this is against building Codes. And second, if the sconces are changed out later, or if someone needs to access the electrical connections, removing the mounting plates would most surely tear the wallpaper in the process.
So, best to have the wallpaper behind the plates, rather than pasted on top of them.