And the plan met the approval of the whole multitude, and they chose Stephen, a man full of faith and of the Holy Spirit, and Philip and Prochorus and Nicanor and Timon and Parmenas and Nicholas, a proselyte from Antioch. These they set before the Apostles, and after they had prayed they laid their hands upon them.
(Acts 6:5-6)
That says nothing about bishops or priests.
That passage is actually the institution of the diaconate. The offices of “bishop” (overseer) and “priest” (elder) are mentioned a bit later in the NT.