If you want to be specific then she might not be mixed but her ancestors defintely were. ton of DNA studies have already been done. and ethiopians like her have alot of non-African genetic ancestry. you can look em up.
ALSO NOTE that most ethiopians look nothing like her. ethiopia is populated by 3 different types of East Africans.
first you have the habesha tribes (which she comes from) that are heavily mixed with non-African ancestry. most of em are probably 50% african. 50% non-African. hence alot of em have classic mulatto features. light brown skin. good hair. etc.
next you have tribes like the karrayu oromo (which make up the majority of the country). which are less heavily admixed than the habesha but still has some non-African ancestry. about 70% African. 30% non-African. classic oromo features than be seen below. darker skin. kinkier hair. less mulatto features.
and finally you have the omo valley tribes in the southwest of ethiopia. that have little to no admixture. and you can see what classical pure east african features look like before all the admixture.
doesn't take a rocket scientist to figure it out. all 3 of these groups can't be native to the same country and look this different. some mixing had to happen. AND REMEMBER Arabia is a stones throw away.