Yup.
They might still be "up and running" but likely at a much slower rate than normal (when they should be running faster), and with a higher failure rate as apparently a lot of stuff that was meant to be "vital to the defence of the country" and thus entirely made in Russia was actually reliant on parts that were bought in from outside and relabelled/packaged to hide the fact*, or not hitting the required QC level.
Even if they're still able to source stuff from outside Russia that they need, they're going to be relying on the grey/black market for a lot of it as foreign manufacturers are unlikely to openly be selling it to them, which is always good for actually getting what you ordered, and it being in good condition.
*Some of it is quite basic stuff like precision machined parts that should have been within Russia's ability to make (but cheaper to buy in and keep the change).
Relying on grey/black market supply chains must introduce the tricky problem of counterfeit microprocessors and components.
It caught out the US iirc, causing the death of a USAF pilot when his ejection seat couldn't work.