Not sure where the confusion is coming from, or why you are getting conflicting information.
I just asked on the WhatsApp group for Hong Kong, and quickly got replies from five members there that they had recently received loaner cars from Tesla Hong Kong during their service visits. One of those as recently as last week.
I also asked Tesla Hong Kong for confirmation, and here is their (albeit unofficial) reply:
1] Tesla Hong Kong have loaner cars available upon request and availability. They have a few and usage is quite high.
2] If the car breaks down on the road, the driver calls the Tesla Hong Kong technical support hotline and Tesla Hong Kong will arrange towing. This will be covered by warranty.
Basically, loaner cars and roadside assistance is available in Hong Kong.
If you would like, please PM me your name and contact number and I'll have someone from Tesla call you to clarify.
Regards, Mark.