AirPrint Not Working with 5 gHz WiFi

I’m trying to print wirelessly from a MacBook Pro to a Brother HL-L2350DW. It works fine when the MacBook is connected to the 4.2 gHz wifi, but when I connect to the 5 gHz wifi the Mac says “Looking for printer…”. I can print wirelessly from a Windows laptop that is connected to the 5 gHz wifi, so it seems like it should work from the Mac.

The router is a CenturyLink C4000XG with a single SSID for both frequencies. The router handles which frequency to use for each device. The MacBook stays on the 5, but the printer is always on the 4.2 (can't do 5). If I disable the 5 gHz radio on the router, AirPrint works fine, but then my download speed drops by over 80%.

I read in another post that disabling IPv6 on the printer would fix this problem, but it didn't for me. Another post said that setting up a whole house mesh wireless network would fix it because they automatically route data between the 2.4 gHz and 5 gHz bands without you ever having to worry about it. I have not tried that yet because my wifi coverage seems fine, and the information I've found about mesh networks don't mention that capability.

The MacBook Pro has Ventura 13.0 and the printer and router have the latest firmware.

Thank you for any suggestions.