Connect I2C Oled via USB to Linux Box
That is a completely wrong chip for that job. It literally is an I2C to USB adapter, enabling USB via I2C bus. What you need USB to I2C adapter, which enables I2C via USB. FT201 is not a chip to be an I2C master to control slave I2C devices from PC. To the PC this chip looks like an USB serial port, and is an I2C slave chip to some other master device. This chip enables an a I2C master like a microcontroller, which otherwise has no USB connectivity, to communicate with a PC.