I will say that any two drive elements should NOT have any play between them. The sprocket should lock onto the hub very snuggly. Others have had this problem (see video). For possible solutions, see the comments. One person suggested that you need a different retaining ring. Others suggest that the wiggle is normal but is a design flaw: the steel and aluminum will wear prematurely.
Gates sells a "Surefit Installation Tool". Seams pretty complex...
https://www.gatescarbondrive.com/~/m...arch.pdf?la=en