Sharepoint oAuth 2.0 retrieved token missing roles and scope

Using code below I successfully retrieve an access token. Taking that token to jwt.ms , it does not have scp or roles though. So when I try and use it in postman url GET https://graph.microsoft.com/v1.0/sites/myCompany.sharepoint.com:/sites/SubscriberAcquisitionResourceCenter it fails. In c# it fails with 401 Unauthorized.

I have added the following permissions:

"error":{"code":"AccessDenied","message":"Either scp or roles claim need to be present in the token."

string siteUrl = "https://myCompany.sharepoint.com/sites/SubscriberAcquisitionResourceCenter";             string clientId = "********-****-****-****-********fe11";             
string tenantId = "********-****-****-****-********5a8f";             
string clientSecret = "***************"; // Updated client secret              
var authority = $"https://login.microsoftonline.com/{tenantId}/";             
var app = ConfidentialClientApplicationBuilder.Create(clientId)                 .WithClientSecret(clientSecret)                 
.WithAuthority(new Uri(authority))                 
.Build();              
var authResult = app.AcquireTokenForClient(new[] { "https://graph.microsoft.com/.default" }).ExecuteAsync().Result;             
string accessToken = authResult.AccessToken;