A Baldur's Gate 3 player accidentally stumbles on some rare Shadowheart dialogue, which only triggers if she is romanced with ...

But while you can be Tav and still meet Shadowheart, Gale, and the rest later on, you won't meet the Dark Urge. You can technically encounter him in a small way in Act 3, but he's not a part of ...

In Baldur's Gate 3 you can romance Shadowheart, Astarion, Wyll, Gale, Lae'zel, Karlach, Halsin, and Minthara, which is pretty much the full recruitable party with the exception of Jaheira and Minsc.