As a confirmation Catechist, I can tell you that there is no instructional requirement for the sacrament of baptism.
As a confirmation catechist (or any level of catechist) you should know that instruction is required for baptism of adults, and that a child over age 7 is an adult for this purpose.
Can. 11 Merely ecclesiastical laws bind those who have been baptized in the Catholic Church or received into it, possess the efficient use of reason, and, unless the law expressly provides otherwise, have completed seven years of age.
Can. 851 The celebration of baptism must be prepared properly; consequently:
1/ an adult who intends to receive baptism is to be admitted to the catechumenate and is to be led insofar as possible through the various stages to sacramental initiation, according to the order of initiation adapted by the conference of bishops and the special norms issued by it;
2/ the parents of an infant to be baptized and those who are to undertake the function of sponsor are to be instructed properly on the meaning of this sacrament and the obligations attached to it. The pastor personally or through others is to take care that the parents are properly instructed through both pastoral advice and common prayer, bringing several families together and, where possible, visiting them.
Can. 852 §1. The prescripts of the canons on adult baptism are to be applied to all those who, no longer infants, have attained the use of reason.
Can. 865 §1. For an adult to be baptized, the person
must have manifested the intention to receive baptism, have been instructed sufficiently about the truths of the faith and Christian obligations, and have been tested in the Christian life through the catechumenate. The adult is also to be urged to have sorrow for personal sins.
If that is the only sacrament you wish your child to partake in due to parental choices regarding future sacraments, there should be nothing stopping a priest from baptizing.
It is not the parent’s choice. The norm is RCIA and the
priest may choose another avenue for pastoral reasons.
Can. 866
Unless there is a grave reason to the contrary, an adult who is baptized is to be confirmed immediately after baptism and is to participate in the eucharistic celebration also by receiving communion