With the scholars of the subcontinent, a lot of them narrate upon the manaabir that the veil of Sayeda Zainab was taken off as they were taken prisoner and their hair was visible to the public. we know that there was a museebah of the hijab, however was the veil only removed from the faces or from the hair too? are there any riwayaat whether strong or weak on this matter?

There is no historical evidence in the maqatil to verify this. Watch this and it will explain

https://youtu.be/3RFY1mImv9c