How to assign the footer for all pages globally
After creating your footer, you can assign it globally to all pages at once:
1. From the WordPress left menu, go to Jupiter X > Layout builder > Footer

2. Now, in order to display them, you need to choose the condition for your footer template, click on the Edit condition button and create rules to display the footer

Note: You can use Default Footer, but it has limited settings and styles rather than the footer you create with Elementor.
If you want to assign a custom footer to a specific page only, please refer to this article.