Hello Michael,
Please open SLD - Software Catalog.
In Software Component type your product - this is the SC you do add in the CMS - Landscape Configurator - Track data.
In tab Dependencies in drop-down menu of Context, please select BuildTime.
If the dependent SCs are not listed here then you will not see them in CMS neither.
Please click on button 'Define Prerequisite Software Component Versions'.
VERY IMPORTANT!!!
Here you have to define the necessary SCs for any development.
For more details please refer to these notes:
1080927 - Creating CMS Tracks for Common Application Types (7.0x)
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1465468 Required SCs for Specific Type of Development in 7.1 Track
1463541 Required SCs for Specific Type of Development in 7.2 Track
1457908 Required SCs for Specific Type of Development in 7.3 Track
1572743 Required SCs for Specific Type of Development in 7.31 Track and 7.40 Track
Regards