Orbi Airprint problems with Epson ET-2650

Yes. All your devices have to be on the same Subnet/IP Range: 192.168.X.X. Being on WiFi or Wired LAN doesn't matter.

I just switched over from an Epson to a Canon. Although Apple professes to have it, Printer Drivers, all so you don't have to go get "drivers" or whatnot. They don't and Ya do. After setting up a new printer I always go to the units support page and see if there is software for the printer. Most likely it's outdated, but works. That's a part of the Apple Ecosystem that doesn't get much attention. This also will give you features that the Apple Light drivers might not.

With my new Canon there was a software package for the Mac that covers the more recent OSs. Also it has some great tools and the stand-alone Scanning Software is pretty great. So with that all installed I head to the Printer Setup in the System Prefs. Select the Printer icon and open the selection panel. At the bottom of the Left-Hand panel there is a + –, click the plus this is what you should get:

The Gold selected one is what I use now. This is with the software I found for my printer installed. Then you get all those specifics that are pulled automatically. The Bonjour, which was a big deal and still around, will be there when you open the panel. Bonjour was suppose to be the end all be all of Universal Peripheral Communication. It didn't really catch on. The one below it that has the IJ, Ink Jet, takes a couple of minutes to show up. Now this next one is using a Static IPA. Which I do since I have three different printers. This is after clicking on the IP button.

This is the IP Panel. See the Globe at the top left. The other was "Default". I put in the IPA and it was valid. Next below in the "Protocol" drop down the first selection is "AirPrint". Select that and the settings at the bottom will auto fill. 

After setting up all three this is what I got as usable printers. On the right it will give you all the info about your printer and buttons for any features. I use this printer setup since I can access the scanner from this panel and also from the Scanner Software as well as from the Print Queue Panel. I can also connect to this printer using AirPrint even on an Android device. The other two setups only give me:

Just limited features of the printer. So with this I hope it's enough to get you started and you can play with it and find out which setup works best for you. But go see if there is Software for your printer and the macOS you're running or close to it.

P.S.

TC_in_Montanashowed you how to set a Reserved IPA in the router. Which I do so I know it's gonna be there.