There have been a couple of threads on the forum recently with users running node-red 2.x with nodejs version below 12, which gives various run time issues which may not be easy to diagnose. See this thread for example, though at the time of writing it is not yet confirmed that nodjs is the cause of that particular issue.
I know there is a warning in the startup log, but most do not look at that. Would it be simple to get a notification in the editor when this is the case? If so then I think it would be worth doing. I don't have the knowledge to implement that, othewise I would have a go myself.