Are there any good pro bono divorce lawyers in Iowa?
You can try the ISBA volunteer lawyer's project, the Legal Aid Society, the legal clinics at University of Iowa, Drake and Creighton, or your county bar association to see if someone will take it on for free. If it's uncontested your prospects are better than if there are property or child custody issues. And, of course, you have to be unable to afford a lawyer otherwise.
I see the problem as getting anyone with a law license at all, let alone a good one.