CVS Caremark Not Covering G7

I recently changed insurance and now have CVS Caremark. My Dexcom G7 is coming back as not covered, even though it is listed under their preferred brands pdf that I found on my plan portal. Although it is not covered, it is allowing me to order it but it will cost me $444 for a 3-month supply. I've been on the phone with CVS Caremark for hours and hours and they don't know why it is saying its not covered.

I am beyond frustrated and exhausted by this. Has anyone else had a similar experience recently?

I should add that I am a type-1 diabetic using insulin pens