I've read estimates that they can produce 70ish missiles a month, while they still we estimated to have a few hundred previously stockpiled. This tracks but also doesn't consider that some of these strikes are from the KH family for tactical warheads with ballast installed instead of warheads, which we know they are also using.
What is remarkable, is even with their dwindling supply and limited ability to produce more, they still don't target military targets. This is incredibly stupid considering that somewhere the Ukrainians are mashing formations and these could be used to target them in lieu of civilians. This says a couple of important things, 1 The Russian intel systems must be utter shit, I mean way worse than anyone thought to include satellite surveillance. The Ukrainian work to hide their movements I"m sure are good, but what it really indicates is just how shitty the Russian abilities are and that they are generations upon generations behind in our satellite technology. 2. It shows that a politician of a singular mentality is in control and not a seasoned military professional. Putin knows only one way to try to get his way when things go to shit, and that's terrorism. A real strategic thinker wouldn't waste resources in this way.
Lastly, and most importantly, these continued strikes prove the need for the extermination of the existing system of government in Russia. Patton was an asshole 75 years ago, but it didn't mean he wasn't right, and he still is.