Can the HPS EMAC RGMII on the cyclone V be connected to an external MAC interface?

It is a custom board -- I have the single-ended RGMII I/Os routed to a KSZ9897R switch IC, specifically port 7 of the switch, which is a MAC interface port.

Thanks for the link, although I've seen and reviewed this example before. The FPGA IP's that are used ("HPS EMAC Interface Splitter Core" which feeds into the "GMII to RGMII Adapter Core" IP) actually only output differential PHY RGMII signals, so it's not something I can use in my design's MAC to MAC configuration.