After baptism and the “explanatory” rites follows the celebration of confirmation:
215. In accord with the ancient practice followed in the Roman liturgy, adults are not to be baptized without receiving confirmation immediately afterward, unless some serious reason stands in the way. The conjunction of the two celebrations signifies the unity of the paschal mystery, the close link between the mission of the Son and the outpouring of the Holy Spirit, and the connection between the two sacraments through which the Son and the Holy Spirit come with the Father to those who are baptized.
Why confirm after baptism? It’s Trinitarian.
216. Accordingly, confirmation is conferred after the explanatory rites of baptism, the anointing after baptism (RCIA 228) being omitted.
So the loose end from RCIA 214 is tied up. I wouldn’t have added it, except as an appendix to this whole section.