The leaves are turning yellow and looks like it's starting to drop.
We Planted Hibiscus, Now the Leaves Are Turning Yellow
Certified GKH Gardening Expert
If you recently planted the hibiscus, it could also be suffering from transplant shock. If this is the case, the following article will help: https://www.gardeningknowhow.com/plant-problems/environmental/learn-how-to-avoid-and-repair-transplant-shock-in-plants.htm