I noticed something while watching the recorded stream on Picarto. It seems you chose the mobile game version of the model for 2B. It's from NieR Re[in]carnation (2021), while the PC and console game is NieR: Automata (2017). This would explain why the model was somewhat low poly. The other versions on Deviantart might have higher res textures too, which you might check out if it looks like it would matter. At any rate, the model seems to coming along nicely with the source material you ended up using. I just wanted to point this minor thing out.