I have the TA-1055 (7 Plus) in the UK and so far I have only received the July security update.
Not good.
It should have come out as my wife has a Nokia 6 (original one) TA-1033 and she received the August patch on about the 10 August. That's not even an Android One phone.
Come HMD / Google how about getting us the August patch before you release Android 9 (Pie) to us.