TLDR: WiFi 7 isn't even ratified or "out" yet, so of course there isn't enough hardware for it.
The WiFi 7 standard hasn't even been finalized. It's not unusual to see companies marketing hardware BEFORE final ratification, but it's like a marketing gimmick more than an actual case of "early adoption" hardware. If you're seeing a situation like this one where a few companies sell routers that support the equipment standard, and there's only one of two adapters that do, just stay away. The Wi-Fi Alliance JUST released the WF7 certification criteria on January 8th, so maybe companies will start trying to release hardware now.
I agree that it's very early to go with WiFi 7 at the moment. The issue that I have with the current situation is that Qualcomm managed to make a Wi-Fi 7 adapter which apparently works with AMD and Intel, while the BE200 is 'locked' to their platform only. They didn't even go with CNVi this time. It's just strange and may sway people towards a certain platform due to a simple compatibility issue like this.
Okay, so then the BE200 is an Intel product that offloads to the northbridge or CPU extensions...not that unusual. If it specifically says it supports only Intel chipsets, then you're getting exactly what they are promising, right?
I recently bought a BE200 for upgrading a very old laptop that came with N wifi with a 4500U CPU. That is pretty old these days! After a driver install both the wifi adapter and bluetooth work as expected. I don't know if I get wifi 7 speeds and throughput yet as this got upgraded before the network and router did but I think it was worth sharing that it does work on old laptops.
I'm more offended by the tiny antennae plugs (which are worse for signal quality than prior generation, bigger plugs, btw). I always break one or two after twenty tries to couple them.