Nvidia and AMD both make discrete mobile GPUs, and those are the only two options for offering better GPU performance on an Intel laptop when Intel's own GPU is inadequate. Nvidia's GPUs have for years generally had a substantial power efficiency over AMD's.
Do Nvidia integrated gpu (mpgu) exist?
Nnvidia claims they exist but all their weblinks to details are dead. https://www.nvidia.com/object/main_mobo_gpus.html