Does unlisted games work for disc to digital?

Yes, it works, as do all Xbox 360 games, on disc or digital. The digital version was removed for digital purchase in 2018. This was because the licenses for the various real life aircraft expired.

The removal (delisting) of any game for digital purchase does not affect digital purchases before it was removed from sale (your game will still work), nor does it affect the disc versions.

The game is complete and does not need disc, digital works perfectly.

GG it works the same as it does for One games game has to be on hard drive and disc in drive if it's not digital

I have the disc version. Does it still work to get the upgrade or is it only vofor the digital game?

That option does not exist, the only options I have under Advanced Settings are 'Specify Unlisted Network' and 'Create Ad-Hoc Network'. To that end, I've tried entering my SSID manually under 'Specify Unlisted Network' and I still get nothing.