It's the in no other game does the triforce appear as the expression of someone's divinity. Therefore we must assume it is the real thing unless otherwise stated.
There is no evidence otherwise. The actual triforce only appears in full before link in Zelda games when it is physically there and...
Zelda uses the whole triforce to seal Ganon at the end of BoTW and it points the right way up rather than downwards as Lorules Triforce does.
The world of BoTW is certainly not Lorule.