As regards the Bindu, it is applied in a variety of contexts, to indicate differing types of varieties and Qualities. When Bindu is described in the context of your ॐ चामुण्डायै कवचाय हुम् She encompasses and overrides everything inside the Universe. She is the last word fact. The Devi Mahatmya https://www.youtube.com/shorts/mSjgFVl-9jg