I checked on my local site with Elementor, and it doesn't appear to me as if the Elementor accordion module provides for dynamic sources for the tab titles and content (but I could be wrong, I'm not an Elementor expert), so I doubt that it is possible with Elementor accordion modules.
It should be possible using Views with Bootstrap, where you use Views to dynamically generate the markup for the Bootstap accordions where the content comes from custom fields, but you would need the Views plugin for that, and from your account it looks like you are just using Types.
Sorry, I couldn't see that on my local test site, but in any case the dynamic sources for Elementor modules is created and managed by Elementor, it's not something we have any control over, and so you would be better asking Elementor support about what is or is not possible in this scenario.
(There's nothing special about Types custom fields in this case, you would be using text fields, the "repeating" part is simply that they can have multiple instances stored with the same key.)
I could help you if you were trying to do this Views, but there's not much I can say about the Elementor modules, I'm afraid.
