Unable to edit About content in Frontpage Sections

The about content in frontpage sections shows up in customizer, but not when in edit mode in wordpress. Where do I go to find and edit/remove the homepage content? I tried updating the page while it is blank, hoping it will override in customizer to delete all the old content, but that didn’t work. I’ve looked in page builder, but was unable to find where to go.

Anyone know where I can go to edit/remove the about content please?

I migrated content from old theme (madrid) with sliders, and that seems to have caused this issue.

Thanks!

The page I need help with: [log in to see the link]