Here is what I found..will add here for info
A study of downed Iranian drones (the Russians wrote "Geran-2" on their boards) showed that they had many foreign components despite Iran's sanctions.
For example, the Shahed-131 UAV is the predecessor of the Shahed-136 version, and the two have similar working principles and the most unified main components.
The flight control unit of the Shahed-131 drone contains five custom printed circuit boards (PCBs) with Texas Instruments TMS320 F28335 processors, a set of highly integrated and efficient microcircuits for demanding control procedures.
The Engine Control Unit (ECU) contains a single circuit board with a Texas Instruments processor that monitors all engine characteristics during flight.
The electronic systems inside the drone are connected by wires with special markings, all markings in the UAS (production system) are written in English.
The electronic components of the drone are all civilian. From the point of view of the guidance system, there is only a civilian-grade GPS receiver, which allows the drone to specifically deal with stationary objects.
A system has been added to the GPS guidance system to prevent GPS signals from being jammed by electronic warfare (EW). A primitive inertial system is installed on the drone, which can maintain approximate heading and altitude if GPS navigation is disabled.
Therefore, the GPS guidance system of this UAV is difficult to suppress using electronic warfare.
https://inf.news/en/military/92ce2368d61455bcbd741c5bc15f7874.html