Ah OK
The Last Standing Ends Game will end the game and bypass the rounds.
Maybe uncheck that and set up a mechanic for last standing ends round.
Use a player counter to check when there is 1 player left and an end game device to end the round
but enable that player counter by another player counter that checks if there is more than 1 player.
This way you’ll be able to test the map without triggering end of round, and when published a single player could hang around on your map without ending the game.