We currently only offer 2,8″ and 7″ skins by Max2Play. There are also some other skins preinstalled on Jivelite that you can test and some by users you can install in the jivelite web interface menu.
You can also check out this correspondence (German, use Google Translate. If you have trouble understanding, let me know.) where another user got his WaveShare 5″ Display to work. This is the WaveShare 7″ solution in our web interface, so try installing that.