Hi dear,

Yes you can pursue cost management accounting course along with MBA. However since you are already preparing for CFA, I'll recommend you not to overburden yourself with too many things as all the three courses are hard and requires proper studies and time. But in case you are able to manage your time then yes you can of course go for cma with mba as it'll enhance your technical skills and you'll get an edge over other mba students.

Good luck