How to integrate my Form element with Mailchimp in Elementor?
In Elementor you can define an action for a Jupiter X Form element which can send an email or redirect to a page after a user submitted the form.
You can also integrate the MailChimp with Jupiter X Form element.
Beware! This element is a part of the Jupiter X elements. Jupiter X is exclusively developed by Artbees which represents new useful elements to Elementor. In order to see the Pro version of Elementor Forms, you need to look for it in the Elementor knowledgebase.

Note: Before adding the MailChimp as an action to your form, you must add the Mailchimp API key to your website from WordPress left menu > Elementor > Raven >MailChimp > APIKey
You can learn more about how to get the Mailchimp API key by referring to this article.
In order to add MailChimp action to the raven Form element:
1. In Elementor, drag and drop a Form widget into your layout so that a new panel will open on the left side of the Elementor with the element-specific settings.
2. Go to the Content tab and in the Settings section add a MailChimp action.
3. A new MailChimp options panel will emerge at the bottom of the Settings section. If you added Mailchimp API Key before, you can configure the MailChimp options.
4. Update the page.
Note: You can add a simple Email action to the form so that you will be notified after a user submitted the form on your website. To learn more about it, I suggest you refer to this article. You can also add a Redirect action to the form. In order to learn more about it, you can refer to this article.