She was arrested based on probable cause that she had committed identity theft. The search warrant is the process by which evidence needed to support formal charges.

In order to compel her to obey the orders of the court.

If that order is lawful, then it probably has a chargeable crime behind it. If it doesn't, then there should be limit.

Compelling someone to open a phone with a fingerprint is far from settled law. It should be litigated properly as part of the trial rather than with a "contempt" charge.

In this instance, it is the court that is attempting to end run an unsettled area of the law using "contempt".