Actually when it comes to weapons sub component supply we don't need to research everything. many of the components could be sourced from abroad, and in war situation/sanctions we could set up an illicit supply ring getting the necessary components from the balck market or via smugglers. Russia likely source many of its electronics components like Chips from its illegal supply ring in UAE, Turkey etc and brought it back for their industrial use.
Looking at our RN-01-SS missile for example, we could source the engine from abroad with the many turbojet suppliers out there. It will save time instead of trying to reinvent the wheel. Iran's Shahed loitering drone for example uses Rotax engine from Austria, and its Model 358 loitering munitions use mini turbojets sourced from the Netherlands AMTJets.
AMT Netherlands (Advanced Micro Turbines) designs, develops and manufactures small gas turbines for the propulsion of radio-controlled flying aircraft. Study's are also undertaken to put our turbines in other aplications like auxiliary power units, and remote heat and power generators. AMT is...
www.amtjets.com
I think there's a reason why our missile projects comes so slow, compared to other nations. From the look of it we decide to start from the ground up, instead of relying on ready components.