I'd suggest waiting until AMD formally launches these CPUs, before criticizing Dell for not shipping them.
BTW, Dell takes their time even to start shipping Intel CPUs. My team at work ordered some Precision desktop machines, earlier this year. I think it was March, but it could've been April. Anyway, we asked if we could get them with Raptor Lake CPUs, but they said "not yet" and wouldn't give us an ETA for when they would. A couple months later, they finally added Raptor Lake as an option, but it was too late for us.
Now, it could be that they were dragging their feet because they had lots of Alder Lake CPUs in their inventory, or maybe Intel gave them a really sweet deal on them and they had to move that inventory first. However, it's not the first time I've noticed a substantial lag between a new CPU launching and when Dell starts offering it in their Precision machines. So, even if Dell doesn't have ThreadRipper 7k models available on launch day, that could just be down to Dell's normal lag.