Iran transfers ballistic missiles to Russia, sources say

They traded almost all of their societal capabilities for a few more billionaires.

Putin begging for weapons from everyone, but only receiving garbage from North Korea and Iran. (While Zelenskyy receives quality tech from Europe and US, and Ukrainians impress with drones.) Heartwarming.

desperate scraping at the bottom of the barrel intensifies

Partly. I mean most of their resources are owned by the oligarchy and most of their population is being drafted to be fodder. So they probably don't have the resources to start up all new manufacturing of something that high tech right now which takes a while to build the tooling.

But the other issue is there used to be a treaty against making short range and tactical nukes since those are only good for actual use not as a deterrent. Trump backed out of it so the weapons manufacturers could make a new shitload of money from the US taxpayers designing them. Even though the US has very little use for them itself. And of course Russia backed out without the US being in it. But Russia probably hasn't gotten too far in making them yet. But Iran doesn't really have the tech to make long range strategic missiles for nukes, so they've probably been making short range ones for a while now to threaten their neighbors with.

Honestly I don't understand why Iran hasn't felt some very real consequences for its support of Russia yet. Like, why do the factories producing Shahed still exist?

You know. They provision it. Says right there in the article.