Is it permissible for me to benefit from the metals financing that the bank deposited into my account, given that it was done without my consent, and I consider it impermissible due to the lack of possession of the commodity?

There is no obligation to bear the error of an employee who changed the transaction without permission. Buying permissible shares from the bank and then selling them in the market is safer and further from the suspicion of prohibition in organized tawarruq, which most scholars have deemed forbidden, and a resolution by the Islamic Fiqh Academy was issued prohibiting organized tawarruq conducted by some banks.