The SNAP UIM product has it own user community that this might be better answered in.
that can be found here:
I have not worked with snap in a very long time.
I know it is a very paired down version of the full UIM so it would not surprise me
if the custom QOS is not available in the reports.
Most of the things as I recall in snap were very basic and did not allow for full customization as the full product does.
Sorry I really can not be of much more help
Maybe other could be in the snap communities.