Ooooh. I'll look into it! Thank you for checking it out and letting me know :D
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Your animations should be defined in the animated sprite. Animations will appear on the animation section of the inspector (that section can be seen in the screenshot I included in this page, itch isn't letting me add it to this comment).
If you are not seeing it there after adding them to the animated sprite then it might be some issue with the refresh function, reload the scene and it should be there.
The way those dropdowns world is each movement type has some animations defined. When those movement types call for an animation they use the animation you define on the inspector. So for example, if you make a new animation in the animated sprite for running you can set it for the run variable in the animation section and you will see it when you start running.