PXE Installation

Has anyone tried to install ZorinOS (core) via PXE, because i found out that after booting from a PXE-Server AND also after installing it then on the client, there is no Ethernet-Hardware available. It seems funny, because i loaded and installed it via LAN (nfs). NMCLI says that the device is unmanaged, but NM can not manage it (it happends nothing by … eno1 managed on)!
Can anyone explain this miracle - thanks.

Did a search “NMCLI says that the device is unmanaged”.
Have you seen this item on askubuntu, which other questions seem to link back to re Ubuntu 16.10 and 18.04: