The heightened international attention to her is due to the official confirmation, which is not common in NK politics.
It occurs to me to ask if her elevation would be made so public if it were not for the UN report of torture and the human rights violations of North Korean citizens? I suspect Jong Un doesn’t trust too many people so bringing her into the “family business” is a natural, plus he is also putting a softer, prettier face out to the public. See how progressive the Norks are? I have a few bridges for sale if folks buy his tripe.