This source says that women are not obliged to daven maariv but may do if they wish.
Although the Shulchan Aruch (108:7) allows one to recite a Tefilat Nedava in a certain case, Halacha Berura (22nd question on this page) writes that one should not do so, because nowadays we do not allow reciting a Tefilat Nedava unnecessarily.
If a woman’s maariv is Tefilat Nedava, it seems that it should not be said?
Even if it is not Tefilat Nedava, davenning is not a simple thing. Various kavonnos are needed. I will mention HaShem’s names many times. Since women are not obligated to daven, perhaps they should not. Do we have sources for this issue to help me CMLOR?