Isn't there any way put more cards on the shelves? Don't need to be something next gen, just "something".
No, they already ordered the amount of chips and even if they wanted to increase GPU production then from where would they acquire the GDDR6? That's rhetorical, it's all sold through for 2026. And possibly even beyond.
They are also likely to switch some N48/N44 allocation (any excess production they can't sell to partners with VRAM to pair them with) to Epyc based on reported market conditions (where there are shortages of the CPUs themselves).