No. The credential trace concerns the principal applicant's professional qualification. Dependents' documents are about relationship and identity, so a spouse and unmarried children under 21 typically need marriage and birth records rather than educational ones.
Handle records-gathering for the household in parallel
Delays that come with archived transcripts often make the principal's file the slow one, so start dependent documents at the same time rather than after. If a marriage certificate or birth record is itself held by a body that has been reorganized, the same custodian question applies. Each person's status and steps depend on their own nationality and circumstances.
Before any productive task begins, the spouse needs a distinct immigration classification that itself carries employment authorization; a recruiter willing to place both spouses cannot substitute for that requirement. The principal must independently show citizenship of Canada or Mexico, an occupation named by USMCA with its required credentials, and prearranged US employment rather than self-employment; Canadian permanent residence alone is insufficient. If the spouse intends to work, the family should look at the spouse's own qualifications and citizenship for an independent route, or at whether the agronomist's employer structure could support L-1, where L-2 spouses are employment-authorized incident to status.