Game only launches with integrated graphics

Minecraft: Windows 10 Edition launches with my Dell G3 3500's Intel UHD Graphics, even after specifying the High Performance Graphics (GTX 1660-Ti) in both System Settings and NVIDIA Control Panel.

It uses GPU 0 - 3D and sometimes shows GPU 1 - Copy. It should utilize GPU 1 - 3D as the new Launcher does.

I've tested versions as far back as the implementation of Renderdragon, and they all have this issue.