Interesting that they went with AMD for GPU, but not too surprising. My experience with a nvidia 5060 on my laptop is that nvidia's drivers on linux still have no idea how to reliably wake from sleep. Fixing that just not the priority for them I guess - datacenter GPUs doing AI probably never sleep and just idle at 50 watts or whatever.
valve themselves also personally employ multiple major contributors to the amd linux drivers
It was kind of expected since Steam Deck (obviously) had an AMD APU, and AMD works much better with mainstream Linux projects in general.