I'm sorry, but Niara's 100% on this one. The BG3 halflings are the worst halflings in D&D history. As much as I've criticized Solasta on models and their appeal, I've at least created numerous halfling characters in that game that look like actual halflings. The BG3 halflings are just... Not good.
I should take a screenshot of my drowish evil halfling wizard from Solasta and post it. You'll see another example of how a halfling is supposed to look... Or maybe my halfling paladin.