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The wiki page for stereo_image_proc says that is publishes disparity and points2 topics. I see both of those in your output:

/sxs_stereo/disparity
/sxs_stereo/points2

You can usually use those images for 3D processing, depending on your application. If you really need a depth image for some reason, you can probably find a node to convert the disparity image to a depth image.

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