I want to interface a stereo camera to jetson nano for computer vision applications. The camera is a USB 2.0 device. Is this device supported by the jetson nano?
Except for the micro-USB port, all ports support USB2 or better. USB3 ports are backwards compatible with USB2 devices. That said, there may be other requirements for camera compatibility beyond USB, so this is not a guarantee the camera itself will work (if the camera uses standardized drivers chances are high that this will work, but for example, there may be some image formats not supported).
Please check guidance of launching USB camera in FAQ
As linuxdev mentions, there can be image formats not supported. YUV422(YUYV, UYVY, …) and MJPEG are general formats and supported.