Now the info is out, we can draw some conclusions, both military and civilian.

With similar payload capacity to Simorgh - but much less complexity better reliability - Zoljanah could be used for military satellite launches once testing is finished in a couple of years. https://twitter.com/AmirIGM/status/1356266728196628483

And with the first and second stages being solid-fuelled, it could make for a militarily-useful IRBM. However, Iran is unlikely to make the conversion unless relations with the West are pushed over the edge.

There's also the case of the Salman flex-nozzle solid rocket motor with the potential to be used as a third stage (the SLV uses a liquid fuel stage). This would extend the range of an IRBM variant even further, but the missile would be quite large and unwieldy.

Aside from all of these - development of a new 1.5m solid-fuel motor makes this Iran's largest and most powerful solid-fuel motor. The experience and knowledge gained is valuable for any future military and civilian endeavours.

Head of Iran's Space Agency Morteza Barari says Zoljanah makes sending satellites to SSO (Sun-Synchronous Orbits) possible. SSOs are v. important for surveillance sats as they can be made to fly over a specific location at a consistent time e.g daytime. https://twitter.com/barari_ir/status/1356318286342926338?s=20