1920s Photography 35mm Printing – Photography Stack Exchange

I am researching for a historical fiction novel. Background is 1921, United States. Using an American Tourist Multiple camera.American Tourist I am trying to figure out making prints, what type of enlarger would be available. Character has access to a city newspaper office or a portrait studio, but is just an amateur with some darkroom experience. I think (please correct me if I’m wrong) that portrait studios would not be using 35mm.
Any advice?