Yes, 3D animation can be and quite frequently is used in VR experiences. 3D animations help build out the immersive and interactive environments of VR. Their ability to represent hyperrealistic surroundings with lifelike textures, physics, lighting, and so forth can make VR worlds convincing to the user.
However, 3D animations intended specifically for VR use need to factor in concerns like user interactivity, potential motion sickness, and so on. Those concerns contribute to making 3D animations for VR even more complicated to create than 3D animations for traditional screens.