Is the prayer of a man and a woman, each praying alone in the same place, counted as two congregational prayers?

If a man and a woman pray in congregation while they are alone, it is not permissible unless she is his mahram or his wife. In such a case, they both attain the virtue of congregational prayer, and she stands behind him. However, if she is not, it is not permissible due to the forbidden seclusion (khalwa). It is disliked for a man to pray with a non-mahram woman alone, and what is meant is a dislikedness that approaches prohibition (karahat tahrim). If a man prays alone or a woman prays alone in the same place, neither of them is considered to be praying in congregation.