NVIDIA 1650 limited to 35W on linux, on windows it would go above 50W, ideapad 5 pro 5800h 16ACH6

Yes, the main thread being this:
https://forums.developer.nvidia.com/t/has-anyone-been-able-to-run-an-rtx-3060-laptop-gpu-at-more-than-80w-on-linux/192959

There are actually two mechanisms thet influence the allowed power draw, 1. configurable TGP 2. Dynamic Boost (15W)
Hard to tell which applies in your case, nvidia-powerd is for dynamic boost but doesn’t work on AMD.