Jesus's appearing to Mary is multiply attesed and in all cases where we read of this, it is clear that Jesus appears to her and her group before anyone else (e.g. before the male apostles).
• Mary and her opinion on issues everpresent to the Jerusalem church.
• Mary is listed in all gospels.
Both the Gospel of Matthew (chapter 28) and the Gospel of John (chapter 20) reprort on Jesus's appearing to Mary, and they do so without one having borrowed from the other.
• They are strikingly/uncoincidentally similar.
• Traditional witnesses were saying “Jesus appeared to me/us”.