What do you mean y "import"? Where would the scene collection and profile come from? Presumably a scene collection or profile created in OBS and then exported as a file or group of files.
In OBS, "File", "Show Settings Folder", it will show you where available scene collections are stored. On my computer it is C:\Users\{my username}\AppData\Roaming\obs-studio\basic\scenes.
If you copy a scene collection json into that folder before you run OBS, it will be available to OBS without explicit import. You could then use either obs_frontend_set_current_scene_collection or the command-line switch to specify the scene collection.
Profiles can be done similarly