Hi Hana,
This site seems to not be using GeneratePress theme.
The issue stems from the Header’s z-index
though. It would be best to reach out to the support of the theme you’re using for assistance with regards to this.
If you add this CSS in Apperance > Customize > Additional CSS:
@media (min-width: 1025px) {
.header-transparent .header-transparent-wrapper {
z-index: 1000;
}
}
You would see what I mean. As mentioned, it would be best to reach out to the support of the theme you’re using for a more appropriate solution.
Hope this clarifes! If you’re referring to a different website, kindly let us know.