Question re: CGM Approval for T1 Child

Question for parents of T1 kids who use a CGM here in the U.S. - did you experience any issues/problems getting insurance approval for your child's CGM and related supplies? A colleague of mine has a T1 kid and they are interested in the new Dexcom CGM. They are still waiting for a doctor's order (which I wouldn't think would be an issue?) and then have to deal with the insurance approval. Anything they should know? I know about approval for CGMs in the T1 adult world, but not for kids. Any thoughts/suggestions are appreciated!