Q: Unable to set manual time zone on ipad

I think "Set Automatically" refers to the time, not the time zone. Apple devices are pretty fussy about having the correct time zone for the location, so you may not be able to change it.

Are you connected to the internet via a VPN, or corporate private LAN, so your IP appears to be in Sydney? Just guessing here.

Hi,

try syncing with itunes while the PC is connected to a free wifi (free being not protected by VPN,Proxy,corporate private VPN)

Also if the iPad uses a SIM. try contacting the carrier about the timezone settings that is set on the SIM.

Turn on location services .