you can still find full lobbies of walker assault, supremacy, cargo, hvv, etc on PS4! even DLCs depending on the time of the day. try switching your matchmakign region among Europe, US west and US east. you might also be interested in joining the Discord for active console players: https://discord.gg/eWMyhmrNAg
That is true, but if you're looking for Bespin Sabotage or Extraction to complete contracts we're out of luck. I have been trying to get enough players for Sabotage for 3 days now to complete contract for EE4. There just aren't enough players, and players will get tired of waiting so they leave the lobby.
the Discord is designed to populate DLC lobbies. you won't know if you don't try it. pls consider joining it and using the platform. this forum is not going to help you much other than inform you of the existence of the Discord of active PS4 and Xbox players
