Parts made from several individual parts.

[Manfred Schaefer]

Generally, yes (if I understand your question correctly). Although you usually need to use the components separately in a model, it helps to have the complete shortcut available to use, for example, in a parts list in your building instructions.

But only those combinations that have actually been released as real parts should be included in the library, not every possible combination.

Hello,

yes, you get it right. My concern in this post is to use these parts in the parts list and bom.
The other option would be to store these parts locally and each user would have to do this for themselves as well.
I will register as a parts author and start working on such parts. Only parts released by Lego.

Greeting

Manfred