Select gameday status for each player
Select the menu item "The Season" and click on “Gamedays".
Open the 3-dot menu of the respective game.
In the tab “Game Overview” you can select each player’s gamedays status. The players from your selected starting line up automatically get the status "starting line-up". All other players get the pre-selected status "not in the team".
The options in the drop-down menu allow you to give each player a more specific gameday status.