Streaming live at 10am (PST)

Unnecessary white space in mobile view

I have a question about a problem which occured while making my website responsive for mobile. When I check out the page on my Iphone 11 pro, there is always a unwanted white space while scrolling down. I have already tried to search after negative margin values and to change this, but still It occurs.
What can I do to solve this problem?

Here is my site Read-Only: LINK
(how to share your site Read-Only link)