The intent is to make it easier for developers and sensor manufacturers to map their sensors & actuators on top of supported hardware and to allow control of low level communication protocol by high level languages & constructs. Also. please refer to Introduction to MRAA & Introduction to UPM for more details.
By default, MRAA/UPM library is already on PX30 Yocto/Ubuntu/Debian images.
ADLINK MRAA libraries has been contributed to Eclipse MRAA GitHub which is supported on LEC-PX30 & LEC-AL-AI with industrial I-Pi SMARC
how to build & install MRAA/UPM on Yocto/Ubutnu/Debian: