Propagation of FetchContent targets when installing

Hmm I’m afraid I’m having real trouble getting that to work, it seems like the installed file ends with _Targets not -config if I do that so App can’t find the dependency LibB at all. Is there something else I need to do with a -config.in file? I don’t see any reference to _Targets in your book either. If you have any other suggestions I’d be very grateful to hear. Thank you!