Coop campagin?

[Wight]

Hi, can you play through the campaigns with a friend in coop?

[Blyatman]

no, not yet, BF2 got no QOL updates

[Kazumus]

It's possible to play co-op campaign via Splitscreen, however if you want to play the campaign via Multiplayer, there is a workaround solution that I wrote a guide on:
https://steamcommunity.com/sharedfiles/filedetails/?id=3184789905