The reason for reducing it from the Sunnah is based on the reported report that the amount of time for God to hold all of His servants accountable on the Day of Resurrection is like the two rak’ahs of Fajr, so He used to shorten them out of mercy for his nation. In general, it is a prayer, so its ruling is the same as prayer. With the exception of the obligatory prayers, even if they are voluntary servitude, then in the two rak’ahs of Fajr there is suspicion of servitude out of necessity. Because of the obligatory prayers included in the voluntary prayer