you can still play the mode on pc version of Titanfall 2 FD, though with all the server crashes due to hackers, its not worth it; its best to get the Northstar Mod for the game (you can find it in Steam workshop or a quick google search can lead you in the right direction
FD was affected as well due to hackers crashing the servers, pvp was affected more than FD; but please take into account that the DDOS attacks affected everything, my last actual FD match was in July 2021in recording for me due to this before the launch of the Northstar Client