Does it really matter if this small piece of background information is unsourced? A historical treatment of trans identity isn't the focus of the report. Seems

Does it really matter if this small piece of background information is unsourced? A historical treatment of trans identity isn't the focus of the report. Seems like rather an irrelevant criticism to be honest. I don't quite understand why you believe this to be a problem, or why you think this somehow undermines the rest of the work.