Currently only delegated user permissions are supported, and this is very sub-optimal for bots and service applications that need to monitor Teams presence of users.
I struggle to find a reason why data as public as user presence should be available in a limited scope, but not in in an application wide environment. As DaveHmp pointed out, the name Presence.ReadWrite.All strongly suggests that read access was intended.
In a callcenter setting, this feature is all but essential.