Official Hong Kong government transport sources explicitly describe bus services in Hong Kong as operating primarily or mostly with double-deck buses. Operator and route-specific records further confirm double-deckers in active service. The claim is accurate, though it does not mean every bus in Hong Kong is double-deck.
Caveats
The claim is broad: double-decker buses operate in Hong Kong, but not all Hong Kong buses are double-deck.
Most authoritative support comes from franchised public bus services; the claim does not distinguish franchised, non-franchised, tour, or special services.
Low-authority sources such as YouTube videos, blogs, and LLM-generated background are unnecessary and should not outweigh official government transport documents.