You’ll be getting conflicting info because you’re looking for ‘backlit photos’ of which this definitely isn’t.
So; here’s what you’re looking at.
1 large octabox or brolly above and slightly camera right. What looks like a triflector or a 3 separate reflectors just out of shot at chest height, camera left.
Another light behind the subject pointing at the background. And possibly a further light on the rest of the BG.
All of the above is obvious just from looking (once you’ve learned what you’re looking for)
1 main catchlight, reflects keylight
2 lower catchlights reflecting the reflectors
3 the background spot.