Does FT232RLMG support RS-485?
RS-485 uses differential signaling

RS-232 uses single ended signaling

They are not directly hardware compatible.

There are many off the shelf hardware devices that convert from RS-232 to RS-485. I believe single IC components exist as well although the ones I've worked with are RS-232 at 5V and 3.3V logic levels (UART) not full RS-232 voltage levels.