The esim works but there is a undocumented step in the process.
After you scan your qr code, save the esim to the phone, enable data roaming, etc, It still wont work because you need to REGISTER it with 3 hong kong via a url (even though it says kyc registration not required, it actually is). I only figured this out after ripping my hair out and scrolling reddit for 2 hours.
you need to look at your phone's settings, get the phone number of the phone plan and register it with the url:
https://www.three.com.hk/prepaid/account/en/rnr-reg
(you can only visit this site when it shows you are connected to carrier (ensure it is only chunghwa telecom ONLY ) and but not the internet (pic attached) )
once you open the url, you need to type the word passport in document section and provide a passport number in the document number section. then a green checkmark box will say success.
after wait around 5 minutes, put into airplane mode and turn off, then it will work.
Like the process is very confusing because they don't tell you this but it is the cheapest data provider for 22 AUD which is hilarious.
