The Intel AX210 is the most recent one I've used, but I assume they'll release a WiFi 7 version.
M.2 is just PCI-E at the end of the day, so should be entirely viable to adapt one if something didn't have an M.2 A-key slot.
You can often find these mini m2 board to full size pci-e adapter cards or find these adapters pre-mounted on a board for sale.
MediaTek has been doing wifi 7 PCIe chips for a bit, but it seems like they're only really available on AMD motherboards so far. :(
Reports from Intel side are that maybe they've started doing something fishy or some-such with their m.2 cards? Folks on non-Intel can't seem to use them.
The lag here is alas, in my view all too typical. I'd really love for USB & m.2 cards to be out much faster, to speed adoption, but it feels like the industry always slow walks this shit out.