**Purpose of the feature.** It would be great if DocumentDB supported Change Streams. That's one of the most requested features in FerretDB: https://github.com/FerretDB/FerretDB/issues/175 **Describe the solution you'd like** Change Streams are supported. **Describe alternatives you've considered** Disappoint everyone because of the lack of support for Change Streams. **Additional context** There seem to be some hooks in the current DocumentDB code for Change Streams, so I guess there are some plans to support them.