let me add more details.
according to Camera Architecture Stack, when libargus is used, you may using camera_override.isp to apply tuning parameters.
and, we do support monochrome sensors, but, those ISP settings were available after TX2 and Xavier series.
note,
we do not use public forum threads to support image tuning stuffs,
please contact with camera partners for monochrome settings within camera_override.isp