SEEED RPi OS Medel

a few days ago i was looking at the RPi 4 compute mod and an OS for it. i am not sure if i was here at the Seed site, but an there was an OS offered that i hadn’t hear of called medel or something, i can’t remember. now i can’t find it. does anyone know where it is? my other question is what architecture bit is it? should it be in the project hub under ‘OS’ or ‘operating system’ or ‘rpi os’?
thanks