I have given permissions :
Delegated permissions
TeamworkTag.Read
TeamworkTag.ReadWrite
Teamwork.Read.All
Application permissions
Teamwork.Read.All
TeamworkTag.ReadWrite.All
Even after granting the required permissions, the access token does not include I have verified using of jwt.ms.
The permission issue was resolved after authenticating through admin consent: https://login.microsoftonline.com/{tenantid}/adminconsent?client_id={client_id}