I’ve checked the other pages and it seems that all the pages are showing the white space except for the blog page and the styles page which seem to work fine with no white space. I think it has something to do with generateblocks.
I don’t see the problem while on desktop and even when I try to view the page through the customizer and choose mobile view, the problem does not show up. Yet, once on my phone, I can see the white space.
I checked the option of Flexbox, and it is already selected as the main structure.