Since all Volvo B10M of MTR Bus have retired recently, there are no (patent?) Volvo B10M working in Hong Kong.
However, Volvo B10M is still the main fleet for some routes in Singapore, that you can see them almost everywhere.
Although I did not have a chance to take Volvo B10M, I saw a Volvo B10M @ 193 outside Boon Lay Bus Interchange.