Motherboards compatible with Coral Dual Edge TPU?

So I’m looking at Google Coral Dual Edge TPU for better object detection in Frigate.

While the M.2 E-key slot isn’t hard to find on motherboards… it looks like the Dual Edge TPU is special and requires a bifurcated slot, two PCIe 2.0 x1 (lanes? channels?) in 1 slot.

The Coral page also says:

Although the M.2 Specification (section 5.1.2) declares E-key sockets provide two instances of PCIe x1, most manufacturers provide only one. To use both Edge TPUs, be sure your socket connects both instances to the host.

Does anyone own a motherboard that natively has a bifurcated M.2 E-key slot? Do any manufacturers even make those? Or are you required to run the Dual Edge TPU with an adapter to make it work?