The only way to play mutliplayer is by using XV2Patcher, and it only allows you to play with other users that are also running a EAC bypass. (XV2Patcher comes with one.)

If you're planning to install XV2Patcher for mods and/or EAC bypassing then you need to add the following to your launch options after installing it so that wine will load the modified system libraries that XV2Patcher uses to inject into Xenoverse 2:

WINEDLLOVERRIDES="xinput1_3=n,b" %command%

or if you're on a steam deck then add this line instead to fix controller support:

WINEDLLOVERRIDES="dinput8=n,b" %command%

after adding that then you can launch mod installers just like normal by using wine and they should be able to install and run just like they would on windows.