Thank you @webdev, looking for Webflow IX2 helped me find the solution.
This post is kind of a duplicate of this.
I guess the simplest way to reuse animations, is to bind them to a hidden button and call them with like that:
document.getElementById('hidden-animation-trigger-button-id-goes-here').click();
StackOverflow also explain how you can fire the ClickEvent only.
Still would be nice to have a tutorial about this, the docs in this forum seem a litle bit outdated 