On the last pi, the eth port is on a pci express bus. For routing usage, you will need to either have to add a usb3-eth adapter or run "router-on-stick" with a single eth port and VLAN.
Or, you could also look at the NanoPi R4S or upper model with multiple eth and 1 Gbit capable SQM.
Or, you could also look at the NanoPi R4S or upper model with multiple eth and 1 Gbit capable SQM.