I am playing on a server hosted on 1.19. I am using MaLiLib version 1.19.0-0.13.0 and Litematica version 1.19.0-0.12.1. I placed a schematic in the nether, and tried to raise it to proper height, but it would just stop rendering at 256

Isn't the nether y range still only 0 - 255?

Shoot, I didnt even know the nether had a lower build limit