I'm just interjecting a tangential issue here (and no, I've never read of Gracie having a concussion) but just in general, we know figure skating doesn't have a great track record on addressing head injuries or developing concussion protocols for skaters in competition, let alone in during the thousands of hours of practice going on in rinks around the country every day.
More and more research points to even one mild concussion being reason to alert caregivers to mental health follow-up care. Patients who were in risk groups for depression exhibited greater likelihood of signs of depression three-six months after the injury, as compared to control groups.
There's a lot of ifs here. But in a high-pressure sport that intersects elite competitions and training with adolescence and favors athletes who are driven perfectionists, I'd say at least some of that puts many elite skater in depression and anxiety risk groups.
There's more work to be done here by USFSA in regard to educating coaches, skaters and parents as to the long-tail effects of one head smack (or even whiplash from jumps) and to develop strict protocols for removing athletes from the ice during any freestyle session -- all coaches should be trained as concussion spotters -- as well as establishing return to play protocols that include medical professional release to train.
ETA: There is a line in SafeSport which says "Encouraging or permitting an Athlete to return to play prematurely or without the clearance of a medical professional, after a serious injury (e.g., a concussion)" is a reportable physical misconduct offense. It's a start. But it's not widely-known by parents, skaters, etc.