Is it possible to animate basic 3D model without animation in Unity?

I am relatively new to Unity 3D. I have a 3D plant model that I found from internet without any animation or bones attached to it.

I wanted to animate the leaves of the plants by adding bones to them but i couldn’t find sources for non humanoid characters. When I tried choose “Generic” option and “Create From This Model” option the Configure button is not appearing.

Is there any way to create your own skeleton system in Unity from this kind of empty models or do i have to create the bones in another 3D application like Blender(I never used them before so if there is way in Unity i would prefer it).

Yes friend it is possible, just have your model at hand in a T pose and with separate shoes or feet and search Mixamo and then login or register with Adobe account then look for the option to upload model or something like that there will ask you the model and it will give you instructions to continue, even this is possible in 2D with special Scripts that create an unofficial Animator and also from the material that is not divided into sprites, of the latter I am not very sure, I hope I have helped you, remember
always “The truth is out there”