I noticed that the Dueling Fighting Style is not adding its damage on the character sheet. I tried it on my Lv. 2 Ranger, who was using a single rapier without a shield, and did not see the +2 to damage being added.

On another note, is Dueling explicitly being changed in BG3 to not work with a shield? Since apparently the description requires one hand to be "empty" in BG3. Whereas in 5e, Dueling is "a weapon in one hand and no other weapons," thus forbidding dual-wielding with it but still allowing a shield.