Thanks, I haven't changed the region however (set to Australia) and the options were there prior; just an odd occurrence
I confirm those channels should be present in Australia.
The AC88U is a bit old and I don't remember now if mine was set to region Australia when I got it, I'm guessing it was.
The more recent models appear to set the region to Asia which is almost the same as far as channel availability goes.
Perhaps it's time for a factory default reset and reconfigure ...