most likely issue is the background image in the hero container block.
try removing that and test with a solid background color. It will at least show if that is the issue.
There is a JavaScript script that always causes me a problem in downloading, as it seems to be related to the template.
Attached is the script link. I hope you confirm the information for me. Is it affiliated with the template or not?
That is jQuery, many plugins use it, GeneratePress only uses it and only loads it if you have the Sticky Navigation on your site.
If you disable any sticky navigations in the theme and it still loads jQuery then it means another plugin is loading it,