solved! basically look into ros gazebo bridge ans try to figure out from there. gz topic -l and echo and info would help you. figure out your camera topic. some useful cmds:
gz topic -i -t /world/april/model/x500_mono_cam_down_0/link/camera_link/sensor/camera_sensor/image
ros2 run ros_gz_bridge parameter_bridge /world/april/model/x500_mono_cam_down_0/link/camera_link/sensor/camera_sensor/image@sensor_msgs/msg/Image@gz.msgs.Image
ros2 run rqt_image_view rqt_image_view