The surgery was a success according to the doctors.
As you guys can see, the ball was removed from the socket and the neck was partially removed.
The logic behind this is that the space where the bone used to be will slowly develop tissue/ cartilage hence able to support small animals like cats. He said we have an option of placing it back in by using pins but he did not recommend this as there will be complications later on in the future. In the US, some vets have introduced hip ball implants in cats, however it's in very early stages and still not widely recommended yet.
With the removal (FHO), cats will be back on their feet and be able to live a normal life. Just need to make sure she doesn't over exert herself over the next couple of weeks. No need of physical therapy, just need to let her walk and roam around by herself, however avoid jumping and other extreme stunts.
As the doctor was saying that with cats in this similar situation (without FHO), they will learn to heal by themselves over time where bone tissue will join back again, but most of the time the rejoining will be imperfect and may lead to minor complications too in the future. So FHO was the best option, as the void space now will develop tissue and sort of create a soft joint, as well as the elimination of pain because you don't have 2 broken bones grinding into nerves.
I was shown a video of a cat that underwent the same procedure at the vet last month, and she started walking (very minimal limping) within 3 days. I'm hoping my cat recovers fast as well. It's not easy seeing her like this

I'll be able to bring her back home tomorrow, will further update then.
For now, the vets have been very professional in dealing with the situation.
and wish she had a speedy recovery. is she the only cat in the house?