When we honor newly canonized saints, who is typically responsible for crafting the akathists for them? What's the approval process for such a thing?
Usually the various autocephalous Churches have a few official "go-to" hymnographers, to whom they provide biographical and other relevant information about the saint.
"O Cross of Christ, all-holy, thrice-blessed, and life-giving, instrument of the mystical rites of Zion, the holy Altar for the service of our Great Archpriest, the blessing - the weapon - the strength of priests, our pride, our consolation, the light in our hearts, our mind, and our steps"
Met. Meletios of Nikopolis & Preveza, from his ordination.