Euthymia
My guess is that whoever builds the installer package Excluded those plug-ins because at one point BandLab did not intend to give them away with CbB, but then they decided otherwise and while the plug-ins get copied, the config file didn't get updated and maybe gets overwritten each time.
Not really.
This is all by design and started with Music Creator 7 when the style dials were introduced. First discovered and discussed in that area of this forum. Intentionally excluded in the plug-in inventory, the plug-ins mentioned support the style dials. The versions of SONAR that bundled the plug-ins by name have copies installed in the regular VST folders. The excluded binaries that support the style dials are installed with the PC modules.