A feature that seems like it should have been there at launch is finally in EA’s Star Wars Battlefront.
From the Patch Notes.
Play Walker Assault or Fighter Squadron against AI bots together with a friend in online co-op, split screen (console only), or singleplayer.
Most of the other things in the patch notes were map fixes, and small QoL updates to make the game last. Below is gameplay captured by Battlefront Updates of the new offline mode.