As the previous users have said, I’m not sure what the problem is but I will try to help:
If you have no idea what the Dope Sheet Action Editor is then there’s your problem. Look into how to use it because it is used to store and organize various animations for a rig. If this is not your problem continue -
Select the armature and mesh of the model both in Object Mode.
Export as .fbx, under Export FBX options check Selected Objects.
Import into Unity, set scale, etc. In the Inspector under Import Settings, under the Rig tab set Animation Type to Legacy and Store in Root. Under the Animations tab make sure Import Animation is checked.
The animations should show up under the Animation tab under Clips as well as in the Project view if you expand the model you imported.