https://learn.microsoft.com/en-us/graph/api/resources/oauth2permissiongrant?view=graph-rest-1.0&tabs=http
oAuth2PermissionGrant resource type - Microsoft Graph v1.0 | Microsoft Learn
Represents the delegated permissions (OAuth 2.0 scopes) which have been granted to an application, often as a result of user or admin consent process.
resource typemicrosoft graphlearn