This one has so much black that it could technically be used on the S10+ as well. But this wallpaper from Reddit user archace69 makes more sense to be used on the Galaxy S10 or Galaxy S10e.
You can save this Galaxy S10 Wallpaper to your smartphone by doing a tap-and-hold gesture on the image itself and then choosing the "download image" option. Don't know how? Watch this video tutorial to learn.