The unofficial entrance is still accessible as of 08/2022. As others have mentioned, look for the blue-colored entry next to the photocopy shop (you can find these images all over the internet). There is 1 dog stationed at the entrance constantly who will bark whenever anyone passes the door (we walked by at night to scope out the area and the next day for the hike and it was always present). Some of the neighbors sitting along the street noticed us and commented that the entrance was closed and we wouldn't be able to get up. However, one tenant heard the dog barking and asked us to come up. He directed us to walk up further where we were greeted by the woman that many of the reviews mentioned. There will be an additional 10+ dogs, but all of them are harmless, so don't be intimidated by their barking. The women requested 100k from each member in my group (400k total). You never know how much she's going to ask for and it is about impossible to bargain with her (we are Vietnamese and can communicate with her). The backyard is quite filthy and the woman herself is quite rude (she mocked us after we asked again if we needed to turn left after the ladder), but that's fine. We were grateful to be given entry.
The climb currently is far more difficult than what others have mentioned. I hike regularly and this is by no means an easy or moderate hike. There is a ladder at the beginning followed by a steep climb requiring you take your time to get proper footing and to get a hold of some vines. This is tricky as well on the descent. If you are not in great physical condition, please do not convince yourself into doing this hike. The path itself, due to rain and less people frequenting the path, has many sections overgrown with plants. There will be branches and thorns in some areas you need to watch out for. Add the continuous incline and the humidity and it makes this a pretty challenging hike. Some people mentioned 20 mins up and 10 mins down. This is not possible for the vast majority of people. Double or even triple this time. Plan for at least 2.5 hours in your day to factor in the climb, soaking in the sights up top, and the descent.
Again, if you are not in great physical shape, please don't take the risk. If you do, wear comfortable outdoor shoes, put on some bug spray, and bring plenty of water. Bring a towel as well since you will sweat quite a bit. Enjoy the incredible views up top!