I have lived in several commie block apartments over the 30 some years I lived in Romania, and in every single one every radiator had a manual valve I could use to regulate temperature.
Yes, but those valves were rusted stuck open all the time and nobody could change them unless they emptied the whole water circuit, which never happend. And the whole installation was so full of rust, any new valve would only last a year at most until it got stuck again.