How to find a Medicare part D that has Zep in their formulary

My husband will be going on Medicare in February or sooner (he's 66) if the math works out less to add him to Medicare and if part D covers it now (he's currently on my work insurance and my plan does not cover zepbound) but I'm having a heck of a time finding out which part D insurance companies covers zepbound with severe OSA. When I check on the gov dot com site it doesn't give exception to cover zepbound with OSA (just flat out states not covered). So I'm kind of stuck in a loop. We're paying out of pocket but he's going to need to go up to 7.5 and it's too expensive. However, if I can find which part D companies cover it I can take him off my insurance and he can go on Medicare. I apologize if I have any Medicare terminology wrong as I'm still learning about all the different parts e.g A, B and G etc.

Not sure if it matters but we live in Illinois.