One way to do that would be for one person -- the "scribe" -- to share their screen with the others, and type the report into a Word document. Perhaps begin with "brainstorming" -- everyone suggesting points to make in the report.
Once you have a list of points to make, the scribe can expand them into sentences or short paragraphs -- the first draft.
At that point, the group can discuss and suggest changes, and the scribe can revise the first draft to create the final report.