Thanks for the clarification and sorry for the late reply.
There is a Skeleton Baking functionality available at the SkeletonDataAsset (the file with suffix _SkeletonData that is generated from your imported assets). In the SkeletonDataAsset Inspector, click on the gear icon and select Skeleton Baking. This opens a window providing options how you can bake a Spine Skeleton with animations down to a Unity prefab using an Animator Controller to control animations. This way you do not need any Spine components to playback your animations.
Note however, that just a subset of Spine's animation features can be translated to Unity's animations, so this workflow is only recommended for very specific use cases.
