Apple already announced the virtual event for WWDC21 which will be live from June 7 through June 11, 2021. The popular US-based Apple news breakdown media 9to5Mac created some beautiful WWDC21 inspired wallpapers for iPhone and Apple Watch.
According to their technical thoughts on this artwork, the wallpapers are optimized for iPhone 12 Pro Max, but it still beautifully looks on all iPhone models. There are also optimized wallpapers available for the Apple Watch, which are good-looking on the Watch face.
You can download these WWDC21 inspired wallpapers for your iPhone and Apple Watch either from the 9to5Mac website or you can directly download all wallpapers all-in-one-place from here.