I picked up the new Razer 16 UHD/FHD with 13950hx and 4090. I didn't run any rendering/modeling software, so I don't know if this will help. But when I updated the synapse app, and set Cpu and GPU performance to Boost and High, I got
Razer 16 13950hx and 4090 laptop
CPU - 13950hx mobile CPU - 19,570 in geekbench 5 (result here). Had some lower scores leading up to that one because the Synapse version that came installed apparently wasn't working correctly and the power limits for CPU weren't being allowed to hit the second tier of power draw (I think, I was vaguely monitoring hwinfo64).
GPU - RTX 4090 mobile GPU - Did a cuda test, got 251,509 (result here)
For comparison, my geekbench 5 scores for my previous-gen desktop were:
CPU - 12900kdesktop (no overclock, cooling Noctua Dh-15) - 19,514 (result here)
GPU - 3080ti Gigabyte Vision desktop (no overclock, OEM cooling) - 253,953 (result here)
Not sure what type of feedback / info you're looking for, but maybe the benchmarks would help