Seeing how little discussion the news of HK borders re-opening created here, I'm not sure there are any non-HK residents trying to enter the city these days.
Official numbers, which counted less than 100 arrival of non-residents per day, seem to confirm that the city completely fell out of travellers radar.

That said, I can confirm first-hand that it's indeed possible. Flying directly from Europe is a pain and I ended up doing a stop in BKK, but it's feasible.
Arrival procedure is long, needlessly convoluted and an obvious waste of time... but do you really care when you have a week of Q ahead of you anyway?

Happy to answer any questions for those who want to come back to the city. The process can be daunting, paperwork is overwhelming and there are a few "..." moments when you have to explain that no, you don't have a HKID card... but it's all worth it in the end. So good to be back after 2 years.