I'm confused as to why you think asking here is preferable simply to looking on the Priority Pass site for the information?
https://www.prioritypass.com/en/loun...premium-lounge
is a landside lounge to which you have access.
(The Terminal 1/Terminal 2 thing at HKG is a very confusing way of simply naming separate parts of the check-ins and adjacent areas. There is only one arrivals hall.)