I don't know how helpful this is; but in my experience of doing KMP over a couple of years... I don't live in a single IDE for it. I would say roughly:
60% - Android Studio (Best support for Compose/Previews)
30% - IntelliJ (Sometimes has better syntax highlighting, best Desktop debugging experience)
10% - AppCode (Had/has best KMM project setup templates, Swift editing for iOS native interface code)