Our Jan 2024 Hong Kong to Singapore on Solstice is also still showing. We’ve had to rebook this several times now, since it first got cancelled in Feb 2020.
I will say though, that while China is maintaining this Zero-Covid policy, I can’t see this going and wouldn’t be surprised to see it cancelled. Or, more likely, have an itinerary change where HK is cancelled in favour of joining and leaving in Singapore.