If you check them before use, you will see that not all components in the libraries have 3D models.

@andyfierman Thanks for your reply.
Is there a way for identifiying a component from library if it has 3D model or NOT prior to using it, as its a very time consuming task to try each one in pcb  3D view.

3D models are a function of the footprints assigned to symbols. They are not assigned to symbols themselves. So work on 3D models has to be dealt with at the Footprint level on a PCB.

You can check, assign, edit and create them yourself.

To check what the status of a 3D model for the Footprint assigned to a Symbol:

Find then Select the symbol for the part you want to use in the Library;

Click on the Footprint to open it in the Footprint Editor:

Click on the 3D Model attribute to check the 3D model:

To check, change or assign a 3D model to a Footprint in your PCB:

https://docs.easyeda.com/en/PCB/3D-Model-Manager/index.html

@andyfierman Thanks. Managed to proceed further with your explanation.