Seems like a deal with Intel to carve out some reason to buy an Intel model. AMDs are much faster, cheaper and consume less power, so the conspiratorial explanation is that Intel bought the high-spec exclusivity. It's been the same with other laptop manufacturers too.

Yeah some configs only allow you to get 3080 GPUs on mobile with intel. That doesn't mean there aren't any with AMD though

Yes this quite outrageous, probably intel is paying to have the "highest" configuration sadly. And this 16G is also soldered, so cannot be replaced afterwards...