Service type tty even for a user@notty ?

[physkets]

The session connected via SSHFS, shows the service type as 'tty', even though the ssh is into a 'notty' session. Shouldn't this have a different service type entry?

$ loginctl session-status c4
c4 - user1 (1000)
           Since: Wed 2017-07-12 13:14:46 IST; 2h 26min ago
          Leader: 8961 (sshd)
          Remote: 10.8.0.174
         Service: sshd; type tty; class user
           State: active
            Unit: session-c4.scope
                  ├─8961 sshd: user1 [priv]
                  ├─8963 sshd: user1@notty
                  └─8964 /usr/lib/ssh/sftp-server

Jul 12 13:14:46 omega1 systemd[1]: Started Session c4 of user user1.