For module hardware details have a look at: Trizeps VIII, Trizeps VIII Mini .
OS-Images and Tool-Chains for Linux and Android can be found at: Linux (Android,Debian,U-Boot,...).
For information on how to build images for Windows 10 IOT see Windows 10 IoT. (2019Q3)
Please do not hesitate to contact Keith & Koep to ask for other supported Operating Systems.