I would have allowed the woman to wear her niqab. And then I would have told her to go get her nearest male relative to testify for her. Failing that she could testify for herself but if she’d rented the car from a man, her testimony would not stand up against his. Because the same (Wahhabist-Sharia) customs that call for the niqab as almost mandatory also specify:

The witness must be deemed sane, the age of an adult, and a Muslim. Non-Muslims may not testify in criminal court. Women may not testify unless it is a personal matter that did not occur in the sight of men. The testimony of a woman is not regarded as fact but as presumption. The reasons women are forbidden to testify in proceedings are (quote):[13][14]

Women are much more emotional than men and will, as a result of their emotions, distort their testimony.

Women do not participate in public life, so they will not be capable of understanding what they observe.

Women are dominated completely by men, who by the grace of God are deemed superior; therefore, women will give testimony according to what the last man told them.

Women are forgetful, and their testimony cannot be considered reliable.

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So. Out of respect for the customs of Islam, I’m going to have to be disinclined to believe any group of female muslim artists and scholars who try to convince me of the freedom, respect, and power they are afforded in their religion. (while totally disregarding the role of the COUNTRY in which they practice it.)