See photo please.
I reported this to Lindsay @ Sternberg help. A confirmed issue over a year ago. Since that time there has been a new version of Halion Sonic and a new version of Cubase. HS 3 and Cubase 9.
When using the programs drop down list on the track header it does NOT show all presets available in Halion Sonic such as Auron,Model C, Trim, Voltage etc.
It only shows the standard Halion Sonic presets plus the Trip SE presets.
This should have been fixed by now.