Question about Technical Documentation Team for MS Teams

I'm a student learning about technical documentation.  We chose MS Teams as a faux company project with bug fixes and new features add.  Just out of curiosity what size of technical documentation team is required to support an app like MS Teams in real life and what are their general titles? I'm curious to know.  

If you can expand, I would love to know what kind of support the TDT provides on any bug fixes or new features. General info is what I'm seeking.  Nothing personal.  

Thank you to anyone who can highlight how this team might be structured.  I'm super interested in learning about it.