Presented here are some of the higher arts a magician can initiate into—either alone, through a group, or with a school. Each specific art encompasses a list of rituals, enchantments, and metamagics. When a magician first initiates into the art, he learns one available ritual, enchantment, or metamagic for free, barring any prerequisites. A magician can learn additional advanced rituals and enchantments within that category by spending the same amount of time and Karma that would be required to initiate to his or her current initiate grade (p. 325, SR5). For each new metamagical technique, however, the magician will need to initiate to the next grade to gain that new metamagic. Street Grimoire p. 139
Notice something?
It's not about awakened individuals, it's only about magicians.
And since mystic adepts are adepts and not magicians they can't initiate into the higher arts by default.