This "nettlp_mnic" is a software network interface card that have modern nic features
such as multiqueues, batch processing and interrupt moderation on NetTLP.
This software nic can communicate to a virtual/physical machine.
You can see details about this from the link bellow.
https://docs.google.com/presentation/d/1i-49l7w5SLngX0xvS7p9kQvkL_D9TBdTf2Kvr5gU2S8/edit#slide=id.p
This software nic can work as a NIC on NetTLP that is a plathome to implement pcie devices by software. You can see details about it from the link bellow. https://haeena.dev/nettlp/