St. Alphonsus says: “See also the special love which God has shown you in bringing you into life in a Christian country, and in the bosom of the Catholic or true Church. How many are born among the pagans, among the Jєωs, among the Mohometans and heretics, and all are lost.”
Notice how he says they are all lost, even though he believed in baptism of desire. It is normal to assume that all heretics or schismatics or pagans are damned and speak in such terms even if there is a tiny chance that they might be saved by baptism of desire.