I was working on this with a client remotely for hours over the course of two support sessions, doing the standard uninstall/reinstall driver dance, messing with connectivity settings in the Embedded Wed Server panel, updating the firmware, and everything else that has been suggested already. That said, I finally figured it out... for my client, at least. This is worth a shot, though, if you've lost your scan icon in the Xerox Print Experience App.
The issue was that, due to either a power surge/failure or some other error, the printer was no longer set to wi-fi as the primary connectivity. The easiest way to figure out if this is the case is to open the Embedded Web Server Panel by typing the printer's IP address into a browser; if the IP address shown on the home page is 0.0.0.0 or something other than the IP address that you used to open the web panel, then the printer is not using wi-fi as its primary connection. As a result, the scan icon will not show in the Print Experience App, even if the printer is still visible and operational.
This is not something that can be fixed on the computer in the driver settings or on the web panel, you have to get into the settings on your printer itself as Admin and change the primary network to wi-fi. This procedure is explained in step 3 of this support document.
Once you change the primary network to wi-fi and restart the printer, go back to your computer and open up the Embedded Web Server Panel again. The correct IP address should show up. If you open up the Print Experience App after verifying this, you should see the Scan option.
Hope this helps!
