Historically speaking, the Hierophant descends from the Pope card in older decks - it represents institutional knowledge, orthodoxy, sanctioned paths to wisdom.

Reversed, I would resist the urge to read it as one fixed opposite. In practice it tends to show up as one of three things: questioning a tradition you inherited rather than chose, receiving guidance from someone whose authority you should not fully trust, or simply outgrowing a structure that once served you.

Context in the spread usually tells you which. What surrounded it for you?

for me it is always been the question the institution reading. every time I have pulled it reversed it was right before I left a job or a belief system that was not serving me anymore