It's logged as P2X time as you don't hold a full type rating (base training is required in HK for the issue of a full type rating). If you had a full type rating you would log it as P2.
Some airlines in Australia will recognise the time such as Qantas but not all will.
You log only time in seat.
For some extra context an FO would log P2 if they were Pm on that sector and P1 U/S if they were PF.
Hopefully that is helpful.