No. The actual family update and individual case requirements may need additional steps.
Use current official milestones
Do not rely on an earlier estimate as a guaranteed joint outcome. Immigrant-visa derivatives enter with or after the principal, and a shared travel plan does not replace the applicable process.
Because the processing fee is nonrefundable, the order matters: first re-read the official FAQ, review lawful-permanent-residence eligibility, admissibility and visa availability, and only then submit the application and fee. The official transfer terms include new vetting, and successful cases remain subject to the applicable EB-1 or EB-2 conditions and visa availability. Recover the original message and identify its sender, issue date, requested action, deadline, receipt or case number, and official response channel. Where a family needs certainty by a specific date, that is a strong reason to have the conventional routes assessed in parallel, since TN, L-1, E-2 and EB-5 have published processing information and long records of practice. Official material describes the process in weeks, which is a description rather than a guarantee, and the final determination remains subject to visa availability. Plan the six weeks around the dates on the notices you hold, arrange remote signatures in advance, and remember that official descriptions of processing in weeks are descriptions, not a guarantee of any date.