Here's the default wallpaper from the 2019 Notebook 9 Pro and Notebook 9 Pen up for downloading if you'd like. Link also in the comments. I posted this before a while ago
Download Galaxy Book Pro Wallpapers 4K UHD [Official]
Download Samsung Galaxy Book 2 Pro Wallpapers in FHD (Official)
Free download Wallpaper Line Laptop Abstraction hi Tech Samsung original [1332x850] for your Desktop, Mobile & Tablet | Explore 46+ Samsung Wallpaper | Samsung Dandelion Wallpaper, Samsung Wallpaper HD, Samsung Wallpapers HD
Samsung Laptop Wallpapers on WallpaperDog
wallpaper for desktop, laptop | vo31-galaxy-7-edge-samsung-blue-pattern
Samsung Laptop Group, samsung pc HD wallpaper | Pxfuel