In order to edit the "Newsletter Popup", navigate to the Toolbar > Edit with Elementor > click on the Newsletter Popup
Or go to Dashboard > Templates > Popups
Locate the "Newsletter Popup" and click on Edit with Elementor:
Please check these guides for further information:
Guide to Vamtam Elementor Builder
Next, click on the "Save options" icon and select "Display conditions":
Here, you can remove the popup from the homepage or add it to whichever post or page.