CVS review: Refill availability

I take Rebylsus 14 mg for Diabetes my wife went there last week to let them know I was getting low and they told her that they can't fill it until 6/23/2023 they said they would order it yesterday 6/25 she checked on it and she was told that they would order it and it would be ready today, this seems to happen every month with this drug why is this not kept in stock, my wife went to get it today 6/26 and she was told it was on back order and I am completely out, she is at this time on her way to Warren Pa. 30 some miles away to get this prescription filled what an inconvenience this is, why do I have to run out every month when this vital to my health, years ago I got away from CVS because of problems like this the only reason I am back is my company requires it. I will be retiring soon and I will go back to using Walmart. There has also been a miss calculation in the 90 days when I pick it up they put the date out 3 months instead of 90 days not all months have 30 days someone needs to educate your pharmacies of that fact