It is not possible to enable AVAB/UDP or ETCNet2 EDMX in the "Output Protocols" section in the Eos Configuration Utility (aka Shell Setup) on ETCnomad & ETCnomad Puck. They are shown but grayed out:
This is expected behavior. ETCnomad & ETCnomad Puck do not support AVAB/UDP or Net2 - EDMX
Use sACN or Artnet instead where possible.