Be aware that the network path must mimic PCIe both in terms of speed and latency, ie it is not a standard L2/3 switch we are talking about here.
NVMe over fabrics using RDMA on IB/RoCE which is targeting datacenters requires highly specialised hardware that is able to xmit close to 300GB/s (equivalent to aprox 2 400 000 megabit/s) as well as at least one miljon IOPS (packets/s) with minimun latency PER CHANNEL. I doubt MT has something that can match that specification.