Even without scripting Blender, GLTF is a "scene" format. GLTF files hold information about models, textures, lights, etc... So you can create your scene then

Even without scripting Blender, GLTF is a "scene" format. GLTF files hold information about models, textures, lights, etc... So you can create your scene then import straight into your game with GLTF (open source, super common). And of course since Blender is used for movies, it does scenes well already.