D&D has mutated and changed a great deal over the years, originally there were only three classes: fighters, magic users, and clerics. Is any game with other classes therefore not D&D? Did you know that in one edition being an elf was your character class? BG3 is just as much D&D as any other edition or interpretation that has come before. At some point we will see a new version of D&D come along and silly children will jump up and down and stamp their feet and tell everyone that version is the only proper version of the game.

-Agent of Satan, but my duties are largely ceremonial.