It seems to be a paper using data from a variety of studies, I don't know if it actually has any new data. I skim read it, and while they cited evidence showing that muscle mass wasn't reduced from male->female levels by following the hormone treatments, the implications for performance were inferred rather than measured. Anecdote from several athletes who have gone through that transition is that their loss of performance was pretty close to the performance gap between men and women (reference this:
https://sportsscientists.com/2019/03/on-transgender-athletes-and-performance-advantages/ )
From what I have read, I suspect that if you were to take an aerobic sport then you might end up with the loss in performance being significant enough that a trans athlete would not enjoy a significant advantage, but if the sport is primarily one based on power then that advantage would not be eroded as much. On that basis, if you were going to pick an event in which a trans athlete might be advantaged, weightlifting is probably quite high on that list.
Not sure this is the right venue for this discussion, seeing as it's no longer about Dr McKinnon - maybe we need a new thread in The Sporting Life?