FA offices likely do preliminary work on FA packages in parallel with admissions office work.
It is likely that much of the preliminary work is automated to handle relatively “ordinary” family finances and flag the non-“ordinary” for human review. But the human review can also occur in parallel to admissions work. Once the admissions office has determined who is admitted, the FA packages for those admitted are finalized (which may require adjustments for merit scholarships or preferential packaging).
Some applicants get questions for clarification from FA offices before the admission decisions are made. This does not give any indication of what the admission decision will be.