This must be a IT glitch.
I am currently in Europe and all I can get is the HK website with no other options as above. VPN would obviously not help.
After some detective work, I found a solution if you have urgent needs. Just type the country main webpage. For example, for France, Germany and HK nte the last component of the url with the language (minuscule) and country (cap):
https://www.cathaypacific.com/cx/fr_FR.html
https://www.cathaypacific.com/cx/de_DE.html
https://www.cathaypacific.com/cx/en_HK.html
I assume that this glitch will be quickly resolved