“What about the questions Jesus asked as a boy (Lk 2:46). Did He know the answers or did He learn?”
There is no application of the word “learn” in Luke 2:46. Luke simply says that Jesus Christ was listening to the teachers and asking them questions. There’s no reason to suppose he was asking those questions because of any lack in his own knowledge, rather than the sort of rhetorical and didactic questioning in which he would later so frequently engage with his disciples or with the Pharisees. He would call on their judgment in order to set the stage for deeper thinking on a subject they had so far understood only superficially.
There is but one passage in all of scripture that employs the word “learn” in reference to Christ’s life: Hebrews 5:8.