Comment by kazamaloo

She sends for approval 1 day before the conference deadline, proceeds to submit the paper with conditional approval, and waits for the actual approvals. It is common practice with one side effect: if reviewers don't like certain parts of the paper, they can ask you to withdraw it (since you don't have an option to update the paper at this stage). If the paper was submitted for approval before submitting to the conference though, then they would have some room for back-and-forth engagement with updates on the paper.