The fileapi codemodel-v2 object does have a little information about target installations, but it does not include the public interface and usage requirements. Most of the fileapi information corresponds to build tree information, but <package>Targets.cmake files typically come from install(EXPORT) which is for the install tree.
I’ve opened CMake Issue 20106 to document and track the status of alternative formats for install(EXPORT) that could be more accessible to non-CMake clients.