If you have ordered an owner policy, you have a right to review the title insurance commitment prior to closing.
I recommend that you not close unless you do review the commitment.
If your title insurer refuses to provide the commitment upon request, fire them and find an honest title insurer.
Bear in mind that the title insurer cannot produce the commitment until the title has been examined. If you have a rush transaction and have scheduled your closing before the commitment has been issued, then I suggest for your own safety that you slow down, take a breath and wait for the commitment.