Write PHP inside custom page headers?

Just adding the shortcode into the Element doesn't work?

You could try this:

add_filter( 'generate_page_hero_output', function( $output, $options ) {
    return sprintf(
        '<div class="%1$s">
            <div class="%2$s">
                %3$s
            </div>
            <div>
		%4$s
            </div>
        </div>',
        trim( $options['container_classes'] ),
        trim( $options['inner_container_classes'] ),
        $options['content'],
        do_shortcode( '[ searchform post_types="tutorial" ]' ) // Remove spacing inside brackets, the forum was executing the shortcoe
    );
}, 10, 2 );

Ah ok, removing the spaces as you suggested worked!

Thanks, Tom.

No problem :)