Hi @Tuan Le ,
While that sort of latency is not typical, the latency for these types of updates can depend on some factors that may not apply in the Azure portal. For example, the service load, latency in the network, or other factors specific to your environment.
Microsoft Graph does have some throttling limits as well that can be impacted by the request type, the scope of the request, and the current load and health of the service itself. https://learn.microsoft.com/en-us/graph/throttling-limits
If you are able to provide a fiddler trace it may be easier to isolate the exact cause of the latency.