Really?  The mother of Pope Siricius [384-399], has her tomb marked as 'episcopa Q' [exists in the Basilican Cemetery of St. Paul's in Rome]

Theodora, the mother of Pope Paschal I [817-824] was an ordained bishop. [mosaic in the Chapel of St. Zeno within the Church of Santa Pressede in Rome].

Mathilda, daughter of Otto I was both a Benedictine abbess and the metropolitian [archbishop] of Quedlinburg [first capital of what is now Germany].  This information is in the Deutches Archiv fur Geschichte des Mittelalters 3 p. 36-70--trans. Edmund Stengel.

St. Brigid of Ireland was both an abbess and a consecrated bishop---[from the 9th Century---documents in Dublin: Dublin institute for Advanced Studies----trans. Donncha O h Aodha, 1978.]

And all of these were either members of the Christian community or Roman Catholic.  Our church's history is too long and convoluted to say "it never happened'.  Every year researchers are discovering more and more information ordained women in the Church.