This Theme has a default footer area. Which can be configured in Appearance → Customize → Footer.
But if you want to add any custom design for the footer section, you can use the Footer Builder which is located in the Menu 'Header & Footer'.
Click `Add new` and press the Edit with Elementor Button.
After setting up the footer layout, save the changes by clicking the Update Button, then Appearance → Customize → Footer, and select the New Page you added.