Because of the modding limitations the launcher can't directly launch the match. You will also need to recreate the lobby in game.
Recreating the lobby in game
In Company of Heroes 2 click Online & Skirmish
Click Create Custom Game
Recreate your lobby
Teams
Team 1 = Allies | Team 2 = Axis
Map
Select Map = Map
Tunning PackCoH2: Battlegrounds
Starting ResourcesUp to you, this does not effect the lobby
Win Condition
Battlegrounds - Gamemode
Cold Tech
Up to you, this does not effect the lobby
Starting Locations
Fixed Locations
Features like Dynamic Weather or Supply system you don't need to set up. They are part of the Gamemode and will be on/off depending on what you selected when creating the lobby inside the Battlegrounds Mod Launcher.
If any of these settings are mismatched the match will be rendered invalid and the game will close!