I mean it should be on another page or something clear enough to understand for new players or coming back players, or people who log in for a couple minutes a day. When i have limited time for the game when i see an option for a quick friendly game i falsely think that the game has developed a way to help the player base, i only say it has to have its own page to avoid confusion. And make a similar way to arrange friendlies for training it will make our life easier. You have already the mechanic just adjust it for normal games.