When an individual is on their deathbed, anyone can baptize them into the Christian faith.
Baptism is a beautiful sacrament, one that opens the doorway to God’s grace into a person’s soul, initiating them into a personal relationship with Jesus Christ. As the Catechism of the Catholic Church explains, “Holy Baptism is the basis of the whole Christian life, the gateway to life in the Spirit (vitae spiritualis ianua), and the door which gives access to the other sacraments. Through Baptism we are freed from sin and reborn as sons of God; we become members of Christ, are incorporated into the Church and made sharers in her mission: Baptism is the sacrament of regeneration through water in the word” (CCC 1213).
In normal circumstances, a bishop, priest or deacon is the ordinary minister of the sacrament. However, in an emergency, anyone can baptize a person who wants to be baptized.
In case of necessity, anyone, even a non-baptized person, with the required intention, can baptize, by using the Trinitarian baptismal formula. The intention required is to will to do what the Church does when she baptizes. The Church finds the reason for this possibility in the universal saving will of God and the necessity of Baptism for salvation. (CCC 1256) ….
Read more here: https://aleteia.org/2020/03/30/how-laypeople-can-baptize-in-an-emergency/
