Hi,
I mean I do not have to import the layout. It is already installed with my Theme "Charity". When I am with Page Builder on that relevant Page "Donation" and hover over the top block with the BG image, there lightsup NO element that can be clicked to work on that (like you did in your screenshot).
See my screenshot from my donation page in SP Builder
https://imgur.com/a/tyPpPnI
How can I access this top block from the donation page? In the simple editor, there the uppermost row to edit is the one under the header image, see screenshot (tested with Chrome).

Maybe you can login to check.