Lung capacity or endurance levels are controlled by hormones and not puberty. In trans women on feminising hormones, hemoglobin, hematocrit and red blood cell count reduce to female norms in just one full blood cycle or 3-4 months. This is the opposite to blood doping.
I see reports that focus on minutiae they select to measure that all appear to require "further study" as one recomendation.
Try more typical differences, body characteristics, general anthropometry, such as lung capacity, and the more important male/female body differences.