3D models and animations in 2D project

I have done a 2D project which I have almost completed now. But I now need to add 3D models and animations through skeletons (all in fbx format) to this 2D project. How would I add 3D models and animations to this project if possible? Also how to get lights in the 2D project.
If this is not possible, should I start over again with a 3D project? Is there no conversion from a 2D to a 3D project as the appearance of the game built so far will not change? Please help me through this. I am a beginner at this engine

Hi @Harshavardhan_P ! You can completely use 3D models in 2D projects. Let try UIMeshRenderer