As of March 1, 2021 Kernl now supports WordPress plugin banners!
As you can see, the plugin detail screen rendered without a banner is OK, but the screen looks a lot cleaner with banner support.
Much better! You can add your own banners by going to -> Edit Plugin -> Icon & Banners while inside Kernl.
If you encounter situations where this doesn’t work as expected, please reach out to jack (at) kernl.us.