It is possible to use CCG4M to replace the CCG2 and USB mux.
Currently, any reference kit/design is not available. But CCG4 is being used in an upcoming reference design that can be used for CCG4M.
You can refer to this KBA for more details - Build CCG4M Project Using CCG4 Project in SDK 3.0.1 and Later Versions – KBA219845
Please take a look at the application diagrams in CCG4M datasheet.