A noted Weibo leaker has said many OEMs have opted out of using Arrow Lake-HX/Zen 5 CPUs in their gaming laptops. Instead, they will pair the GeForce RTX 50 GPUs with Zen 4/Meteor Lake/Raptor Lake SKUs. https://www.notebookcheck.net/Gaming-laptops-launched-in-2025-rumoured-to-pair-GeForce-RTX-50-series-GPUs-with-last-gen-CPUs.909801.0.html
Hopefully these laptops would come with user replaceable/upgradable RAM.