In addition to Unity, you can use several programs to view the 3D model with animations:
1. Blender – Free and open-source, great for editing and viewing animations.
2. Godot Engine – Lightweight and supports FBX, GLTF, and animations well.
3. GLTF Viewer – A simple web-based viewer for GLTF/GLB files.
4. Marmoset Toolbag – A real-time rendering and animation viewer.
5. Sketchfab – An online platform for viewing 3D models and animations.
You can also use many other tools or websites to view the GLB file with animations. For example, you can check it directly on my website here: Embed.3d viewer
Let me know if you need any further help!