Both Vietnam and Indonesia had six points and equal goal differences before encountering in last game of group F. Although Indonesia have a better fair-play index, it won't be used for ranking. Therefore, if the two teams draw in this game, a penalty shootout will decide the first place of group F, which is also the direct qualification for the 2023 U20 Asian Cup.
Of course, both teams don't want to enter the penalties as they want to get it done within 90 minutes. Indonesia have a huge advantage, which is to play at their home ground.
In case Vietnam lose to Indonesia, they can still have the chance to qualify as one of the best second-placed teams.