From what I can tell, the SDK for Thread provided from Nordic uses a precompiled Openthread library that hardcodes the UART pin configuration. This means that users of this SDK must modify and recompile the library manually if they want to use the Thread SDK on their own boards with different pin configurations. The Openthread library is meant to compile as a platform independent binary, and the Nordic supplied SDK should include the specific lower layer code separately. This along with an application/board specific sdk-config.h file would allow the required flexibility.
Are there any plans to support this?
Thanks!