40gbe on wsl

[monotaro3]

I want to use wsl2 in openmpi multinode environment. To this end, fast network is required as a prerequisite.
After some settings including large MTU (jumbo packets) on interfaces, I ran iperf3 on wsl as a client and it achieved around 20gbps between wsl2 and the other node (ubuntu). It also achieved similar performance with -R option. However, when I ran iperf3 on ubuntu as a client, the traffic could achieve only around 2gbps regardless of the traffic direction.
I guess it's because of the low performance of netsh portproxy (In my understanding, I need to use netsh portproxy to access wsl from outside environment in the current wsl implementation.), but I don't understand the detail of what was happening.
Is there any way to solve this? I guess this phenomenon would hurt the computing performance.