PPPoE session server interface

Hello i have multiple PPPoE servers on vlans, and i want to assign them ip addresses according to VLANs.
is there a way to find out for current sessions the active server interface?

i tried
/interface/print
/interface/pppoe-server/print
/ppp/active/print

none mentions the parent PPPoE interface.

winbox shows it as the interface tree and in the “Status” tab of the pppoe connection as “interface”

Thanks.