If the defense does not appeal a missed base by R2 who scores, what happens to the run?

The run counts because, in baseball, if a runner scores and the defense fails to appeal a base running infraction, such as a missed base, that run is considered valid. An appeal is necessary for the defense to benefit from the infraction, which means they must actively bring it to the umpire's attention. If they do not appeal, the offense is allowed to benefit from the run scored by the runner, regardless of the missed base. This principle is based on the idea that the defense must take action to enforce the rules; if they choose not to do so, the consequences of a missed base do not apply, and the run stands. Therefore, when the defense does not appeal, the run is counted as legitimate in the score.