In the USA edition of the book “Rite of Christian Initiation of Adults” there is a “Rite of Welcoming the Candidates”. It is not in the original Latin or the Australian edition. It is clearly optional:
“OPTIONAL RITES FOR BAPTIZED BUT UNCATECHIZED ADULTS
4A. RITE OF WELCOMING THE CANDIDATES …
411. This optional rite welcomes baptized but previously uncatechized adults who are seeking to complete their Christian initiation through the sacraments of confirmation and eucharist or to be received into the full communion of the Catholic Church.”
[From The Rites Volume One, Pueblo Publishing Company Inc, 1990, ISBN 0814660150, page 248. Excerpts from Rite of Christian Initiation of Adults (c) 1985, International Commission on English in the Liturgy Corporation. All rights reserved.]