Hello,
i have an app registration in AAD with app delegated graph api permission Sites.Selected. In Sharepoint i added role "Write" to these app. I tested if i could update an element in a list and it works. But if i try to create a new element with the same token i get an 403 error. Then i set permission to Sites.FullAccess.All and it works. Does it mean that Sites.Selected with role Write can't create elements in a list?
I test also if the given body and url are right in graph explorer. With my admin credentials it works. So the problem is just the permission i think.
Thank you for your answers.