If you only have 1 physical NIC/port in the system you will only have 1 vmnic, which will be vmnic0
What does this command return: esxcli network nic list
are you sure that the phyisical nic that you used is compatible by default with VMware ESXi?
Sometimes with PC's turning ESXi servers you have to manually update the driver for the nic.
can you please check you nic's info here VMware Compatibility Guide - I/O Device Search
In addition to that: Physical NIC 1 is translated to vmnic0
If you can share pc's setting i might be able to check for you.