Orbi RBR 850 - It seems to be only using 5 Ghz and therefore new printer is not able to connect

Hello, just bought a printer (2.4 gHz) that says that it can't connect to the Wifi network as it says that only 5 gHz is being used.  I understand that Orbi (and most other routers send on both bandwidths).  How can I check that both are being used by the router?  I can't seem to find any way to check on the Netgear app.