How to get odometry data to viso2?

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I am trying to get odometry data from a ros2 bag into the viso2, my branch is melodic. I am running it through a ros bridge, and I created a launch file which remaps from="image" to="$(arg camera)/image_raw/image_rect". When I run everything and run the command rostopic echo /mono_odometer/odometry, data is not published. I already checked that there is odometry data in the rosbag. Any advice on how to tackle this issue?