Hi, The 404 page is appearing weird with Title and Logo getting mixed up. Also on mobile, the Logo and Menu button are not displayed on the same line and Google search shows it not to be mobile friendly.
you have a Header Element ( in Appearance > Elements ) that is merging the Site Header and the content. In the Display Rules > Exclusions – add the 404 page so it does not get merged.
I’ve added the 404 page in my predefined headers where Title appears as Dynamic Content in front of Background image. The title is appearing correctly on all pages but for 404 page, the title appears after the background image.