Yeah you also need Crossbow Expert to bypass the loading property (or an artificer infusion). It is doable though.
Crossbow Expert is required to bypass the loading property, but you still have to abide by the Ammunition property! They're separate.
Not with the Artificer's Repeating Shot Infusion:
Repeating Shot
Item: A simple or martial weapon with the ammunition property (requires attunement)
This magic weapon grants a +1 bonus to attack and damage rolls made with it when it’s used to make a ranged attack, and it ignores the loading property if it has it.
If you load no ammunition in the weapon, it produces its own, automatically creating one piece of magic ammunition when you make a ranged attack with it. The ammunition created by the weapon vanishes the instant after it hits or misses a target. I'm talking about 5e of course. Baldur's Gate 3 doesn't have the Artificer. But after the game is released, I'm sure someone will mod it in. We already have Paladins, Monks, and Bards. Had Druids, Sorcerers, and Barbarians; long before Larian added them. I do like the "official" versions of the classes better. Though modders have added some nice subclasses to the Druid and Sorcerer already.