You are sadly mistaken. Although Scripture refers to other symbolic Baptisms, particularly of Christ, but for all water baptism is essential. The exceptions are for catechumens who die before their Baptism, (their explicit desire to receive it, together with repentance for their sins, and charity, assures them the salvation that they were not able to receive through the sacrament), the invincibly ignorant, and children who die before baptism.
So there is no “baptism of desire”?