On Stephen Heiner's website, he sells one of Muller's books and below it has this disclaimer from +Sanborn.
Disclaimer
Father Muller, in another work, denied Baptism of Desire. To deny Baptism of Desire, however, is contrary to the teaching of the Council of Trent, Pope Pius IX, Pope Pius XII, as well as to the teaching of Saint Augustine, Saint Ambrose, Saint Thomas Aquinas, Saint Robert Bellarmine, all of them canonized Doctors of the Church, as well as to the teaching of all Catholic theologians, and to the common teaching of the Catholic Church as expressed in its catechisms. Nonetheless, there is no trace of this error in this work of Father Muller. Consequently I approve of this book, but at the same time I caution the reader against Father Muller’s error in another work. – Bishop Sanborn
https://www.truerestoration.org/press/the-sinners-return-to-god/
Very interesting observation LeDeg, however, Sanborn believes in salvation for Muslim. Jews, Hindus..... by their belief in a God that rewards, so his definition of Baptism of Desire is very broad. I'd have to see where Fr. Muller denied baptism of desire of the catechumen and for what reason, though it would not surprise if he did. Like I said, the subject of the salvation of a catechumen by baptism of desire is something that could be discussed with the likes of Fr. Muller, St. Thomas, and St. Alphonsus Ligouri since they limited BOD to the catechumen.
I do not believe in BOD or BOB of any kind.