This seems to have been Jesus’ preferred form of address for all women.
Matthew 15:28, Jesus addresses the Canaanite woman as “O woman.”
Luke 13:12, Jesus addresses the infirm woman as “Woman.”
John 2:4, Jesus addresses his mother as “O woman.”
John 4:21, Jesus addresses the Samaritan woman as “Woman.”
John 8:10, Jesus addresses the woman caught in adultery as “Woman.”
John 19:26, Jesus addresses his mother as “Woman.”
John 20:13 & 15, Jesus addresses Mary Magdalene as “Woman.”