I created an application and assigned a set of permissions:
"Calls.JoinGroupCall.All",
"OnlineMeetings.ReadWrite.All",
"Calls.InitiateGroupCall.All",
"Calls.JoinGroupCallAsGuest.All",
"Calls.AccessMedia.All",
"Calls.Initiate.All"
Later, I assigned another set of permissions:
DeviceManagementApps.Read.All
Directory.Read.All
User.ReadWrite.All
User.Read.All
When I try to get a token using Postman as in the screenshot below, I receive a token that only has the permissions I assigned in the first set:

See the screenshot below from https://jwt.ms/:

Also, see the screenshot below from the Azure portal:
