The way the covid protocols have worked all season is through internal controls of each school. You look at your program and determine whether or not you can play. If you can't, you notify the other team. McMinn County said they were ready to play and good to go. That has been the standard the entire season. This situation appears to be unique. The Sullivan county health department said that there could not be a game played. Had this game been scheduled to be played in McMinn County then the game would have happened. At the end of the day, the Home team was unable to host the game as scheduled. How can you forfeit the opposing team at the command of the home team? I would bet on a no contest declaration and a bye for Maryville.
If McMinn County is forced to forfeit a huge can of worms has been opened when a county agency can cause forfeits for opposing teams. There is a certain large county in the Western end of the state that will be undefeated against outside teams come basketball season.