Hello,
There is no option to enable the popup for Home page only. However, you can try to use Multiple headers functionality, to create a custom header for the Home page that contains the Newsletter element.
https://youtu.be/BpeXfzNwkOc
Try to use the next custom CSS code:
@media only screen and (max-width: 768px) {
.header-newsletter-popup .et-popup {
max-width: 90% !important;
width: 90% !important;
max-height: 90% !important;
height: 90% !important;
top: 75% !important;
}
}
Regards