This is hardly surprising. Russia was supposedly buying Grad rockets from Iran. They simply don't produce enough MLRS or Iskanders for combat in Ukraine. Production for those will have to be expanded.
Another possibility is a new program like RS-26 Rubezh. With the possible future direct war against NATO, with the US deploying the Typhoon system in Germany, Russia will likely start mass production of this system so they can hit targets in Europe without using the more expensive long range ICBMs. Those will be reserved for a direct strike on the US. This is a return to the days before the INF Treaty where you had the RSD-10 Pioneer and the BGM-109G Gryphon. Everything old becomes new again.