Is a girl considered sinful for removing her hijab and uncovering in front of male medical staff during surgery, due to her inability to walk after the operation, and what should she do in such cases?

Women are obligated to cover themselves and protect their modesty. If a woman needs treatment or therapy that requires uncovering her private parts, she is permitted to reveal what is necessary for the treatment. This should preferably be done by a Muslim female doctor. If none is available, then a non-Muslim female doctor. If none is available, then a Muslim male doctor. If none of these options are possible, then a non-Muslim male doctor. If she is forced to undergo an operation in non-covering attire, there is no sin upon her due to necessity. She must be careful not to neglect this obligation and repent to Allah. Allah accepts the repentance of those who repent.