I haven't played tabletop D & D since the mid-80s. Played the games like Pool of Radiance on the Apple IIe.
Anyway, are there lands outside of The Forgotten Realms on the world where that's set? Or is the Forgotten Realms the entire setting? What makes them Forgotten?
I remember Greyhawk which is I guess a totally different "world "? And Ravenloft. Others too
So I guess to answer the question maybe other parts of The Forgotten Realms? I don't know.
The planet is called Abeir-Toril. The continent where this game and most FR content occurs is Faerun. The region is the Sword Coast.
I don’t think Forgotten Realms is ever referenced within the setting and it’s just the name of the campaign setting, but I could be wrong.