I have a better idea - let's learn nothing from experience! lol.
I respect hard work and talent. But if she's 12 she isn't eligible for a high level international competition for 3 more years. (Juniors is fun to watch but unimportant ultimately.) The reason ladies don't often have repeat world champions (<3<3 Evgenia) is because maintaining the highest technical level is much harder than getting there. At a certain point there's nowhere to go but down.
Idk anything about Mia or her future. But there are reasonable fears, from many examples before her. The USFS might swoop down on her and label her the hope for the future, increasing the mental, emotional and financial pressure on her, she could be at great risk of injury or burn out, and since the jumps are unlikely (not impossible) to survive puberty, she could either develop an eating disorder to try and stop the process, or go through it with everyone watching and lose all skill and confidence before her senior career even starts.