well I can’t speak for official MongoDB… but in my sql experience… a command is not a query - in general… a command is like: create Index, shard a cluster, etc. more admin stuff…
when it comes to queries…the updates/inserts are considered ‘action’ queries in that they actually change the data rather than just present the data i.e. find/group/aggregate/match… so perhaps in a way the action queries can be considered a command but… it’s kind of general agreement on terminology and nothing official - - I suppose if you search the MongoDB manual it will tell you what is considered a command…