What we call the waters of ritual immersion is only part of the meaning of the word, Mikvah. The Hebrew root word kavah means “to wait, to look eagerly for”. Mikvah literally means, “Hope”.
I have to believe that the writers of The Chosen knew this when writing the scene between Eden and Veronica. Eden asked, “What do you do with no hope?” She as may well have asked her, “What do you do when you can’t go to the Mikvah?” And this is a question that the Jews have been asking since the Temple fell.